sum of the angle measures of a triangle angle pairs lesson 40power up gpage 285

Sum of the Angle Measures of a Triangle Angle Pairs Lesson 40 Power Up G Page 285

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Triangles A B C 40°

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Sum of the Angle Measures of a Triangle

Angle PairsLesson 40 Power Up G Page 285

Triangles› All 3 angles added together = 180°

BC45°

45°

Z Y60°

60°

Page 3: Sum of the Angle Measures of a Triangle Angle Pairs Lesson 40Power Up GPage 285

Triangles› What is the m?

BC40°

Page 4: Sum of the Angle Measures of a Triangle Angle Pairs Lesson 40Power Up GPage 285

Triangles› What is the m?

95°

40°

Page 5: Sum of the Angle Measures of a Triangle Angle Pairs Lesson 40Power Up GPage 285

Angle Pairs› Adjacent Angles: Share a common side› Complementary Angles: Two angles whose sum

is 90°› Supplementary Angles: Two angles whose sum is

180°› Vertical Angles: A pair of nonadjacent angles

formed by a pair of intersecting lines.1

Page 6: Sum of the Angle Measures of a Triangle Angle Pairs Lesson 40Power Up GPage 285

Example› Find the measure of each angle:a. b. c. d.

BCD

125°

25°

Page 7: Sum of the Angle Measures of a Triangle Angle Pairs Lesson 40Power Up GPage 285

Practice Problems› a-e

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