Homework 2 parallel lines cut by a transversal

Geometry questions and answers. 2. Alternate Interior Angles Theorem. If two parallel lines are cut by a transversal, then the alternate interior angles are congruent. 3. Converse of the Alternate Interior Angles Theorem. If two lines are cut by a transversal forming congruent alternate interior angles, then the lines are parallel.

I. Introduction: Review parallel lines cut by a transversal. (20 –30 minutes) A. Explain to the class they will be working on a project involving parallel lines cut by a transversal and their related angles. B. Ask students to sketch a pair of parallel lines cut with a transversal on a piece of paper at their desks. Unformatted text preview: were line ´ PQ is parallel to line ´ RS and ´ FGis parallel to ´JK .Solve for a. IV. Consider the figure to the right, where l 1 and l 2 are parallel and cut by transversals t 1 and t 2 . If the m < 1 = 105° and the m < 9 = 70°, Find the measure of all of the missing angles. V. Circle the correct answer for each angle pair or write out the …Nov 3, 2022 · Unit 3 Parallel & Perpendicular Lines Homework 2 Parallel Lines Cut By A Transversal Answers, London Met Coursework Extension, Popular Report Editor Site Online, What Is Methodology For A Research Paper, Statement Of Scope Annotated Bibliography, Essay About Roll Of Thunder Hear My Cry, types of essay formats If your paper is in a field that commonly summarizes the study's main results before ... While some angles are congruent (equal), the others are supplementary. Observe the following figure to see parallel lines cut by a transversal. The parallel lines are labeled as L1 and L2 that are cut by a transversal. Eight separate angles have been formed by the two parallel lines and a transversal. Each angle has been labeled using an alphabet.Trigonometry. ISBN: 9781305652224. Author: Charles P. McKeague, Mark D. Turner. Publisher: Cengage Learning. SEE MORE TEXTBOOKS. Solution for Given that the two parallel lines are cut by a transversal, and the measure of 2 50°. Find each of the missing angles. 1/2 4 8. 6. 21 = 130 degrees….In the video below, you’ll discover that if two lines are parallel and are cut by a transversal, then all pairs of corresponding angles are congruent (i.e., same measure), all pairs of alternate exterior angles are congruent, all pairs of alternate interior angles are congruent, and same side interior angles are supplementary! Transversal Angles

8.1K plays. 9th - 10th. explore. library. create. reports. classes. Unit 3 Test - Parallel Lines Cut by a Transversal quiz for 9th grade students. Find other quizzes for Mathematics and more on Quizizz for free!Alternate exterior angles are two angles that are on the exterior of l l and m m, but on opposite sides of the transversal. Figure 3.6.1 3.6. 1. Alternate Exterior Angles Theorem: If two parallel lines are cut by a transversal, then the alternate exterior angles are congruent. Figure 3.6.2 3.6. 2. If l ∥ m l ∥ m, then ∠1 ≅ ∠2 ∠ 1 ...Displaying top 8 worksheets found for - Gina Wilson Parallel And Perdendicular Lines. Some of the worksheets for this concept are Parallel perpendicular or neither color work gina, Homework 11 parallel and perpendicular lines gina wilson, Parallel lines cut by a transversal gina wilson answe, Gina wilson 2014 homework 2 angles and parallel lines epub, Gina wilson 2014 homework 2 angles and ...Name: _____ Date:_____ Geometry CC-Unit 2 Mrs. Galea Homework 2: Parallel Lines Cut by a Transversal4 2 5. _____ If 2 ǁ lines are cut by a transversal, Key Parallel Lines and Proofs corresp. ’s are . Definition of ’s 2 and 3 are a linear pair. m 2 + m 3 = 180° Substitution Prop. of Equality If 2 ǁ lines are cut by a transversal, alt. int. ’s are . 4 1 1 2 Transitive Property of CongruenceTransversal. a line that intersects two or more lines. Corresponding Angles. Angles formed by a transversal cutting through 2 or more lines that are in the same relative position. If lines are parallel, these angles are congruent. Alternate Interior Angles. Angles that are non-adjacent interior angles that lie on OPPOSITE sides of the transversal.

When a third line, called a transversal, crosses these parallel lines, it creates angles. Some angles are equal, like vertical angles (opposite angles) and corresponding angles …Alternate Interior Angle Theorem. The Alternate Interior Angles Theorem states that, when two parallel lines are cut by a transversal , the resulting alternate interior angles are congruent . So, in the figure below, if k ∥ l k ∥ l , then ∠2 ≅ ∠8 ∠ 2 ≅ ∠ 8 and ∠3 ≅ ∠5 ∠ 3 ≅ ∠ 5 . Proof. Since k ∥ l k ∥ l , by the ...Solution for The diagram shows two parallel lines cut by a transversal. 6/8 If the measure of 23 = (2y + 20) and the measure of 25 = (210 4y), ... Marta did the following work on her homework paper: a. (3y)2 b. 32y2 c. 9y2 Explain what is …This Parallel and Perpendicular Lines Unit Bundle contains guided notes, homework assignments, two quizzes, a study guide and a unit test that cover the following topics: • Parallel Lines, Parallel Planes, Skew Lines. • Lines and Angle Relationships: Corresponding Angles, Alternate Interior Angles, Alternate Exterior Angles, Consecutive ...Parallel lines cut by a transversal practice sheet. 2 VERSIONS - one says same side interior and the other says consecutive interior.Students will IDENTIFY the angle pair shown in the image.Students will then solve for the missing angle measure using what they know about the angle pair relationships.Answer key can be added in the future. Subjects:The alternate exterior angle theorem states "if two lines are parallel and are intersected by a transversal, then the alternate exterior angles are considered as congruent angles or angles of equal measure.". Following the same figure given above, we can observe that ∠1 and ∠7; ∠2 and ∠8 are pairs of alternate exterior angles.

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Question. Transcribed Image Text: 13 PARALLEL LINES CUT BY A TRANSVERSAL Name: Mia Clark (Coloring Activity!) 1 Find the value of x. 14x13=8+5 -8x - 8x Find the value of x. 3x+5+7x-15=180 -3x+15 -3x+15 …Trigonometry. ISBN: 9781305652224. Author: Charles P. McKeague, Mark D. Turner. Publisher: Cengage Learning. SEE MORE TEXTBOOKS. Solution for Given that the two parallel lines are cut by a transversal, and the measure of 2 50°. Find each of the missing angles. 1/2 4 8. 6. 21 = 130 degrees….150° 50° 100° 130° 25°. 21. In the diagram of parallel lines cut by a transversal, shown below, which of the following statements is false? ∠3 and ∠4 are vertical angles. ∠5 and ∠8 are corresponding angles. ∠3 and ∠5 are alternate interior angles. ∠2 and ∠8 are alternate exterior angles. All of the above are false. 22.While some angles are congruent (equal), the others are supplementary. Observe the following figure to see parallel lines cut by a transversal. The parallel lines are labeled as L1 and L2 that are cut by a transversal. Eight separate angles have been formed by the two parallel lines and a transversal. Each angle has been labeled using an alphabet.

Problem 1. For what value of x will lines l and j be parallel? Problem 2. Lines P and V are parallel, what is the value of x? Problem 3. Lines M and N are parallel, what is the value of x? Problem 4. When a pair of parallel lines is cut by a transversal, several special pairs of angles are formed. ∠ABD and ∠EFB are corresponding angles. ... 5 Homework; 2 Triangles and Quadrilaterals. 1 Part A: Different Triangles (20 minutes) 2 Part B: Linkage-Strip Constructions (40 minutes)A line that intersects two or more other lines is called a transversal. When a transversal intersects two parallel lines, it creates eight angles that include corresponding angles, alternate interior angles, alternate exterior angles, and same-side interior angles. In this eighth-grade geometry worksheet, students will practice identifying ...Transcribed Image Text: Lines a and b are parallel and are cut by a transversal t. Using the given information determine the measurement of each missing angle (the labelled angles). Using the given information determine the measurement of each missing angle (the labelled angles).2) If parallel lines cut by transversal, then coresponding angles congruent 3) Given 4) Transitive property (or Substitution) 5) (converse of alt. interior angles) If 2 lines cut by a transversal form congruent altemate interior angles, then the 2 lines are parallel 10 12-Use the homework as a guide, and also base achievement by the problems each student did on their white boards ... Interior- angles on the inside of 2 parallel lines cut by a transversal Exterior-angles on the outside of 2 parallel lines cut by a transversal What does alternate mean?-Every other position Ask students to identify a pair of ...Same-Side Interior Angles Theorem Proof. Let L 1 and L 2 be parallel lines cut by a transversal T such that ∠2 and ∠3 in the figure below are interior angles on the same side of T. Let us show that ∠2 and ∠3 are supplementary. Since ∠1 and ∠2 form a linear pair, then they are supplementary. That is, ∠1 + ∠2 = 180°.Transversal. a line that intersects two or more lines. Corresponding Angles. Angles formed by a transversal cutting through 2 or more lines that are in the same relative position. If lines are parallel, these angles are congruent. Alternate Interior Angles. Angles that are non-adjacent interior angles that lie on OPPOSITE sides of the transversal.Alternate exterior angles: Alternate exterior angles are the pair of angles that are formed on the outer side of two lines but on the opposite side of the transversal. ∠1 and ∠7. ∠2 and ∠8. If two parallel lines are cut by a transversal, then the resulting alternate exterior angles are congruent. ∠1 = ∠7.Our writers will help with any kind of subject after receiving the requirements. One of the tasks we can take care of is research papers. They can take days if not weeks to complete. If you don't have the time for endless reading then contact our essay writing help online service. With EssayService stress-free academic success is a hand away.What's Included:1. Parallel Lines & Transversals ~ Missing Angle MAZE (print and digital)This is a self-checking worksheet that allows students to strengthen their skills in finding the missing angle when parallel lines are cut by a transversal. Students are given one angle. Students use their answers to navigate through the puzzle.2.

DOWNLOAD HOMEWORK 2 PARALLEL LINES CUT BY A TRANSVERSAL AND GET THE ANSWERS. You’ve come to the right place! We know some people prefer to learn by doing, while others like to have an answer key ready to go when they get stuck on a question. Either way, we want you to feel confident and prepared when it comes time for your exam.

Step-by-step explanation. Step 1: State the given information. Here is the given parallel line cut by a transversal: a = 100 degrees. Step 2: Find the measure of angle b and its …If two lines are cut by a transversal so that a pair of alternate exterior angles are congruent, then these lines are parallel. Given k parallel to m with transversal v. If angle 4 = x^2 - 3x and angle 5 = (x + 4)(x - 5), find angle 2. What is a theorem for parallel lines cut by a transversal creates congruent angles? Question: Indicate whether the statement is true or false. 16. The statement, "If2 parallel lines are cut by a transversal, then corresponding angles are congruent" can be used to prove that 2 lines are parallel. a. True b. False Indicate the answer choice that best completes the statement or answers the question a. 20° b, 40 c. 60 d. 80 T V 18.When two parallel or non-parallel lines in a plane are cut by a transversal, some angles are formed as shown in the previous figure. The following are the pairs of alternate angles: ∠ 4 and ∠5; ∠3 and ∠6; Properties of Transversal. A pair of parallel lines is intersected by a transversal. Following are the properties:Transversal. A line that intersects 2 coplanar lines at 2 different points. Perpendicular Lines. Lines that intersect at a right angle. Their slopes are opposite reciprocals. Corresponding Angles. The angles that occupy the same relative position at each intersection where a straight line crosses two others. If the two lines are parallel, these ... Homework 2 Parallel Lines Cut By A Transversal Answer Key - Our cheap essay service is a helping hand for those who want to reach academic success and have the perfect 4.0 GPA.Parallel Lines Cut by Transversals - Math Plane. If parallel lines cut by transversal, then altemate interior angles congruent Transitive property (from 4, 2, and 5.) "sides-angles" (if 2 angles of triangle are 2 sides of AVAT that are the same... (or, 2 angles that are congruent) Strategy: Use parallel lines cut by transversal to identify ...Postulate 11 (Parallel Postulate): If two parallel lines are cut by a transversal, then the corresponding angles are equal (Figure 1). Figure 1 Corresponding angles are equal when two parallel lines are cut by a transversal. This postulate says that if l // m, then m ∠1 = m ∠5; m ∠2 = m ∠6; m ∠3 = m ∠7; m ∠4 = m ∠8

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Math Geometry Two parallel lines were cut by a transversal. Which of the following scenarios is NOT a possible result? O a) A pair of alternate exterior angles with measures of 140° and 40°. A pair of corresponding angles with O b) measures of 65° and 65°. O ) A pair of same side interior angles with measures of 55° and 125°.8.1K plays. 9th - 10th. explore. library. create. reports. classes. Unit 3 Test - Parallel Lines Cut by a Transversal quiz for 9th grade students. Find other quizzes for Mathematics and more on Quizizz for free! 6) If parallel lines cut by transversal, then coresponding angles congruent 7) Substitution property Reasons 1) Given 2) If parallel lines cut by transversal, then coresponding angles congruent 3) Given 4) Transitive property (or Substitution) 5) (converse of alt. interior angles) If 2 lines cut by a transversal form Parallel Lines and Transversals Date_____ Period____ Identify each pair of angles as corresponding, alternate interior, alternate exterior, or consecutive interior. 1) y x corresponding 2) y x alternate exterior 3) y x corresponding 4) y x consecutive interior 5) y x alternate interior 6) y x alternate exterior 7) y x alternate interior 8) y x 4. definition of corresponding angles. 5. corresponding angles postulate. 6. transitive property of congruence. lines m and n are parallel lines cut by a transversal l. which answer gives statements that should be used to prove angles 2 and 7 are supplementary angles? angles 2 and 6 are congruent as corresponding angles; angles 6 and 7 form a ... Parallel Lines Cut by Transversals - Math Plane. If parallel lines cut by transversal, then altemate interior angles congruent Transitive property (from 4, 2, and 5.) "sides-angles" (if 2 angles of triangle are 2 sides of AVAT that are the same... (or, 2 angles that are congruent) Strategy: Use parallel lines cut by transversal to identify ...AboutTranscript. Parallel lines are lines in the same plane that go in the same direction and never intersect. When a third line, called a transversal, crosses these parallel lines, it creates angles. Some angles are equal, like vertical angles (opposite angles) and corresponding angles (same position at each intersection). Created by Sal Khan. ….

Parallel Lines cut by a transversal. heart. 1. Unit 3: parallel lines and transversals homework 2: parallel lines cut by a transversal. Directions if L // m, solve for x and y. verified.4. definition of corresponding angles. 5. corresponding angles postulate. 6. transitive property of congruence. lines m and n are parallel lines cut by a transversal l. which answer gives statements that should be used to prove angles 2 and 7 are supplementary angles? angles 2 and 6 are congruent as corresponding angles; angles 6 and 7 form a ... View parallel_lines_transversal from MATH 2 212 at Vallejo High. Parallel Lines Cut by a Transversal. Upload to Study. ... AI Homework Help;If two parallel lines are cut by a transversal, the consecutive interior angles are supplementary. There are two very important parts of this theorem to pay attention to. First, this statement is only true if the two lines that the transversal is crossing are parallel. Second, note that the consecutive interior angles will be supplementary, not ...Parallel is an alternate term for a line of latitude on a map, while meridian is an alternate term for a line of longitude. Lines of latitude are located parallel to the Equator and never intersect, which is why they are also called paralle...A line that intersects two or more lines. Interior Angles. Angles that are between the two parallel lines. Alternate Interior Angles. Angles between the parallel lines, but on opposite sides of the transversal (make a Z shape) consecutive (same side) interior angles. Angles between the parallel lines and on the same side of the transversal.O D Assume that Angles 1 and 2 are not consecutive. Jordan has to prove the theorem that states: If two lines are cut by a transversal so that consecutive interior angles are supplementary, then the lines are parallel. She decides to solve it by indirect proof using the diagram below. 1/2 3/4 5. m + Which sentence should be Jordan's first ...DOWNLOAD HOMEWORK 2 PARALLEL LINES CUT BY A TRANSVERSAL AND GET THE ANSWERS. You've come to the right place! We know some people prefer to learn by doing, while others like to have an answer key ready to go when they get stuck on a question. Either way, we want you to feel confident and prepared when it comes time for your exam.Explanation: According to axiom 6.3, if a transversal intersects two parallel lines, then each pair of corresponding angles is equal. The reverse of this statement is also true. Hence, ∠1 = ∠5 and likewise for other corresponding angles, ∠2 = … Homework 2 parallel lines cut by a transversal, What's Included:1. Parallel Lines & Transversals ~ Missing Angle MAZE (print and digital)This is a self-checking worksheet that allows students to strengthen their skills in finding the missing angle when parallel lines are cut by a transversal. Students are given one angle. Students use their answers to navigate through the puzzle.2., A. Discuss answers to lesson 1 homework. B. Tell students to write down all the properties they can think of regarding two parallel lines cut ..., Parallel Lines cut by a Transversal. more games . more games . more games . Parallel Lines and Transversal Lesson. Parallel Lines and Transversal Applet. Practice Problems. Problem 1. For what value of x …, AboutTranscript. Parallel lines are lines that never intersect, and they form the same angle when they cross another line. Perpendicular lines intersect at a 90-degree angle, forming a square corner. We can identify these lines using angles and symbols in diagrams. Created by Sal Khan and Monterey Institute for Technology and Education., Unformatted text preview: were line ´ PQ is parallel to line ´ RS and ´ FGis parallel to ´JK .Solve for a. IV. Consider the figure to the right, where l 1 and l 2 are parallel and cut by transversals t 1 and t 2 . If the m < 1 = 105° and the m < 9 = 70°, Find the measure of all of the missing angles. , When parallel lines are cut by a transversal, several different pairs are formed that are either congruent to each other (have the same angle measure) or the angle pairs might be supplementary angles (angles that add up to 180 degrees). Knowing the properties of the different angle pairs can be helpful to find missing angles in a diagram., Quiz your students on parallel lines cut by transversal practice problems using our fun classroom quiz game Quizalize and personalize your teaching. ... assign as homework; share a link with colleagues; print as a bubble sheet; Improve student outcomes for free! Q . …, A line that intersects two or more lines. Interior Angles. Angles that are between the two parallel lines. Alternate Interior Angles. Angles between the parallel lines, but on opposite sides of the transversal (make a Z shape) consecutive (same side) interior angles. Angles between the parallel lines and on the same side of the transversal., Parallel Lines Cut by a Transversal maze will have the whole class Participating till the end.Printable PDF, Google Slides &amp; Easel by TPT Versions are included in this distance learning ready activity which consists of 23 parallel lines cut by transversal in which students are given 1 angle measure and have to solve for the unknown angle …, Angles (9x + 2) and 119 are alternate angles. Alternate angles are equal. So, we have: Subtract 2 from both sides. Divide both sides by 9. Question 6: Angles (12x - 8) and 104 are interior angles. Interior angles add up to 180. So, we have: Collect like terms. Divide both sides by 12. Question 7: Angles (5x + 7) and (8x - 71) are alternate ..., Two adjacent angles whose exterior sides are opposite rays are complementary. Through a point not on a line, one and only one line can be drawn parallel to the given line. Parallel lines are cut by a transversal such that the alternate interior angles have measures of 3x + 17 and x + 53 degrees. The value of x is., A transversal line can be obtained by intersecting two or more lines in a plane that may be parallel or non-parallel. In the above figure, line “t” is the transversal of two non-parallel lines a and b. Also, we can draw two transverse lines for two parallel lines and non-perpendicular lines. Transversal and Parallel Lines, Expert Answer. Transcribed image text: III. If two parallel lines are cut by a transversal, then the interior angles on the same side of the transversal are supplementary. 1 Given: a//b 2 Transversal / cuts a and b Prove: 22 and 23 are supplementary 3 b Proof: Statement Reason 1. a//b 1. Given 2., A transversal is any line that intersects two other lines in the same plane. Eight angles are formed when a transversal intersect 2 lines. When the two lines are parallel the eight angles will have some known relationships. The following diagrams show examples of transversals, corresponding angles, and alternate interior angles., Provide each student with a blank map sheet found on the first page of the Parallel Lines Cut by a Transversal Worksheet. Provide each student with a ruler. Provide each student with blue, red, and green colored pencils. Give each student one small piece of thin paper or sticky note. Students will work in pairs., This module contains lesson on proving properties of parallel lines cut by a transversal (M8GE-IVd-1). After going through this module, you are expected to: 1. identify the different angle pairs if parallel lines are cut by a transversal, 2. determine the properties of parallel lines when cut by a transversal, 3., This Parallel and Perpendicular Lines Unit Bundle contains guided notes, homework assignments, two quizzes, a study guide and a unit test that cover the following topics: • Parallel Lines, Parallel Planes, Skew Lines. • Lines and Angle Relationships: Corresponding Angles, Alternate Interior Angles, Alternate Exterior Angles, Consecutive ..., 2. Fill in the blank: When a transversal cuts through two parallel lines, the corresponding angles formed by the transversal are: A. never congruent B. sometimes congruent C. always congruent Answer: C 3. A student claims two lines in a plane are parallel. To support her claim, she draws a transversal line , Interactive Parallel Line and Angles Explore the rules for the different types of congruent and supplementary angles here by dragging the points and selecting which angle pair you'd like to explore. You can create a customized shareable link (at bottom) that will remember the exact state of the app--which angles are selected and where the ..., Same-Side Interior Angles Theorem Proof. Let L 1 and L 2 be parallel lines cut by a transversal T such that ∠2 and ∠3 in the figure below are interior angles on the same side of T. Let us show that ∠2 and ∠3 are supplementary. Since ∠1 and ∠2 form a linear pair, then they are supplementary. That is, ∠1 + ∠2 = 180°., View parallel_lines_transversal from MATH 2 212 at Vallejo High. Parallel Lines Cut by a Transversal. Upload to Study. Expert Help. Study Resources. Log in Join. ... homework. jyce2.docx. jyce2.docx. 2. BIO888_Demonstration.pdf., 3.1 Identify Pairs of Lines and Angles. 3.2 Use Parallel Lines and Transversals. 3.3 Prove Lines are Parallel. 3.4 Find and Use Slopes of Lines. 3.5 Write and Graph Equations of Lines. The student will use the relationships between angles formed by two lines cut by a transversal to. a) determine whether two lines are parallel;, 150° 50° 100° 130° 25°. 21. In the diagram of parallel lines cut by a transversal, shown below, which of the following statements is false? ∠3 and ∠4 are vertical angles. ∠5 and ∠8 are corresponding angles. ∠3 and ∠5 are alternate interior angles. ∠2 and ∠8 are alternate exterior angles. All of the above are false. 22., Same-Side Interior Angles Theorem Proof. Let L 1 and L 2 be parallel lines cut by a transversal T such that ∠2 and ∠3 in the figure below are interior angles on the same side of T. Let us show that ∠2 and ∠3 are supplementary. Since ∠1 and ∠2 form a linear pair, then they are supplementary. That is, ∠1 + ∠2 = 180°., Alternate exterior angles - angles formed on the outside of two parallel lines cut by a transversal. ∠1, ∠2, ∠7, ∠8 are alternate exterior angles. Consecutive interior angles - angles formed on the inside of the transversal that are supplementary; also referred to as co-interior angles. ∠3 & ∠6, ∠4 & ∠5 are pairs of consecutive ..., Sep 6, 2023 · When parallel lines get crossed by another line (which is called a Transversal), you can see that many angles are the same, as in this example: These angles can be made into pairs of angles which have special names. Click on each name to see it highlighted: images/parallel-pair.js., This Parallel and Perpendicular Lines Unit Bundle contains guided notes, homework assignments, two quizzes, a study guide and a unit test that cover the following topics: ... • Parallel Lines Cut by a Transversal: Solving for missing angles and using algebra to solve for missing angles. • Proving Lines are Parallel: ..., You can assign your order to: Basic writer. In this case, your paper will be completed by a standard author. It does not mean that your paper will be of poor quality. Before hiring each writer, we assess their writing skills, knowledge of the subjects, and referencing styles. Furthermore, no extra cost is required for hiring a basic writer., This lesson focuses on solving for missing angles in parallel lines cut by a transversal., AboutTranscript. Parallel lines are lines that never intersect, and they form the same angle when they cross another line. Perpendicular lines intersect at a 90-degree angle, forming a …, Parallel Lines and Transversals Date_____ Period____ Identify each pair of angles as corresponding, alternate interior, alternate exterior, or consecutive interior. 1) y x corresponding 2) y x alternate exterior 3) y x corresponding 4) y x consecutive interior 5) y x alternate interior 6) y x alternate exterior 7) y x alternate interior 8) y x, Angles formed by Parallel Lines cut by a Transversal Worksheets. Traverse through this huge assortment of transversal worksheets to acquaint 7th grade, 8th grade, and high school students with the properties of several angle pairs like the alternate angles, corresponding angles, same-side angles, etc., formed when a transversal cuts a pair of ..., Two parallel lines that are cut by a transversal form supplementary angles on the same side of the transversal. e. If two parallel lines are cut by a transversal, and the transversal is perpendicular to one line, then the transversal is also perpendicular to the other line. II. Proving lines parallel – part 1 (20 minutes) A. Introduction to ...