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9-12 Integrated Math 2 Unit 1 Lesson 7

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K-5 Math 6-8 Math •9-12 Math

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Integrated Math 1 •Integrated Math 2 Integrated Math 3

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•Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8

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Lesson 1 Lesson 2 Lesson 3 Lesson 4 Lesson 5 Lesson 6 •Lesson 7 Lesson 8 Lesson 9 Lesson 10 Lesson 11 Lesson 12 Lesson 13 Lesson 14

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Unit 1, Lesson 7

Evidence, Angles, and Proof

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Integrated Math 2

Practice

Problem 1

What is the measure of angle ?

<p>Line segment AD is intersected at Point B by line segment EC. Measurement of Angle CBD is 40 degrees.</p>

Problem 2

Select all true statements about the figure.

<p>Line segment AD intersects line segment EC at point B. Angle EBD is labeled Angle a, Angle DBC is labeled Angle b, Angle ABC is labeled Angle C, and Angle ABE is labeled Angle d.</p>

Rotate clockwise by angle using center . Then angle is the image of angle .
Rotate 180 degrees using center . Then angle is the image of angle .
Reflect across the angle bisector of angle . Then angle is the image of angle .
Reflect across line . Then angle is the image of angle .

Problem 3

Point is rotated 180 degrees using as the center. Explain why the image of must lie on the ray .

<p>Line segment AD is intersected at Point B by line segment EC.</p>

Problem 4

ForLesson 1: What’s Up, Triangle?

List one possible length for side .
List one impossible length for .

Problem 5

ForLesson 2: A Triangle’s Sides

Triangle has two known side lengths Side is 10 cm long and side is 9 cm long. Describe the possible lengths for side .

Problem 6

ForLesson 6: Quilt Questions

Find the value of .