Name: Date:

r te p a h Perpendicular and C Parallel Line Segments

Practice 1 Drawing Perpendicular Line Segments Use a protractor to draw perpendicular line segments. Example Draw a line segment perpendicular to RS through point T. S

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130 110 120 R T © Marshall Cavendish International (Singapore) Private Limited. Private (Singapore) International © Marshall Cavendish 1. Draw a line segment perpendicular to PQ.

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2. Draw a line segment perpendicular to TU through point X. X U

T 67 Lesson 10.1 Drawing Perpendicular Line Segments

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5. 3. Use adrawingtriangle to drawperpendicular linesegments.

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Practice 2 Drawing Parallel Line Segments Use a drawing triangle and a straightedge to draw parallel line segments. Example

Draw a line segment parallel to AB .

A

B

1. Draw a pair of parallel line segments.

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69 Lesson 10.2 Drawing Parallel Line Segments

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3. 2. Use adrawingtriangle andastraightedge to drawparallel linesegments.

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Then, draw another line segment parallel to to Then, draw another linesegmentparallel T C Draw alinesegment parallel to Draw alinesegmentparallel to

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Practice 3 Horizontal and Vertical Lines Answer the questions. 1. AB is perpendicular to BC . A

C B

If AB is a vertical line segment, what do you know about BC ?

2. a. DE is a vertical line segment. Draw a horizontal line segment through point D and label it DF . D © Marshall Cavendish International (Singapore) Private Limited. Private (Singapore) International © Marshall Cavendish

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b. What do you know about the angle formed by DE and DF ?

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4. c. 3. Complete.

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1 0 What doyou know about PQ MN

Draw avertical linesegmentatpoint Name it drawing triangleandastraightedge.

through point What doyou know about How many rightanglesare formed by Name it

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p isahorizontal linesegment.Draw avertical linesegment

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Complete. 5. a. AB is a horizontal line segment and CD is a vertical line segment. At point D, draw a line segment parallel to AB . Name it DE .

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b. What do you know about CD and DE ?

Check with a drawing triangle. © Marshall Cavendish International (Singapore) Private Limited. Private (Singapore) International © Marshall Cavendish

73 Lesson 10.3 Horizontal and Vertical Lines

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Horizontal linesegments: Vertical linesegments: Name thevertical andhorizontal linesegmentsonthewhiteboard. 6. Complete.

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isawhiteboard fixed tothewall.

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Put On Your Thinking Cap!

Challenging Practice

In the figure, use a protractor, drawing triangle, and a straightedge to name three pairs of line segments that are

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BC

1. perpendicular.

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2. parallel.

75 Chapter 10 Perpendicular and Parallel Line Segments

08(M)MIF2015CC_WBG4B_Ch10.indd 75 4/30/13 11:18 AM 08(M)MIF2015CC_WBG4B_Ch10.indd 76 76 Identifytwo otherpairsoflinesegmentsthatare perpendicular. 3. PQ Solve. How many rightanglesare formed atpoint 4. QT RS isalamppoststanding vertically ontheground.

isperpendicularto and

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are horizontal linesegmentsontheground passingthrough point

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Put On Your Thinking Cap!

Problem Solving

The diagram shows a road with parallel curbs JK and LM . A J K road

L M B

1. Danie is standing at point A and Alicia is standing at point B. They both want to cross the road. Use a drawing triangle to draw the shortest route each can take, and mark all the right angles like this . Measure the distance along each route.

2. What do you know about the distance between parallel line segments?

© Marshall Cavendish International (Singapore) Private Limited. Private (Singapore) International © Marshall Cavendish Parallel line segments are always distance apart.

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5. 4. 3. The cubeisplacedonaflatsurface. Solve.

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h a A How many rightanglesare there? How many horizontal linesegmentsare there? How many vertical linesegmentsare there?

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