Holt Algebra 1 65 Slopes of Parallel and Perpendicular Lines Warm Up Find the reciprocal. 1. 2 2. 3....

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Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Warm UpFind the reciprocal.

1. 2 2.

3.

Find the slope of the line that passes througheach pair of points.4. (2, 2) and (–1, 3)

5. (3, 4) and (4, 6)

6. (5, 1) and (0, 0)

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Identify and graph parallel and perpendicular lines.

Write equations to describe lines parallel or perpendicular to a given line.

Learning Targets

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

http://my.hrw.com/math11/math06_07/nsmedia/lesson_videos/alg1/player.html?contentSrc=6349/6349.xml

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

http://my.hrw.com/math11/math06_07/nsmedia/lesson_videos/alg1/player.html?contentSrc=7524/7524.xml

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

http://my.hrw.com/math11/math06_07/nsmedia/lesson_videos/alg1/player.html?contentSrc=7522/7522.xml

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

http://my.hrw.com/math11/math06_07/nsmedia/lesson_videos/alg1/player.html?contentSrc=7524/7524.xml

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

http://my.hrw.com/math11/math06_07/nsmedia/lesson_videos/alg1/player.html?contentSrc=7521/7521.xml

AB is parallel to CD because ___________________

AD is parallel to BC because ___________________

Slope BC = ________

Slope AD = ________

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Lesson Quiz: Part I

Write an equation is slope-intercept form for the line described.

1. contains the point (8, –12) and is parallel to

2. contains the point (4, –3) and is

perpendicular to y = 4x + 5

Holt Algebra 1

65 Slopes of Parallel and Perpendicular Lines

Lesson Quiz: Part II

3. Show that WXYZ is a rectangle.

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