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Lesson 2-8. Proof Review. Objectives. Write proofs. Vocabulary. No new vocabulary. Geometric Proof Worksheet. Given: 4x – 14 = 2x + 16 Prove: x = 15. Given: AD  BE Prove: AB  DE. A. B. C. D. E. Given: 2 is complimentary to 1  3 is complimentary to 4

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Lesson 2-8

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Lesson 2-8

Proof Review


Objectives

  • Write proofs


Vocabulary

  • No new vocabulary


Geometric Proof Worksheet

Given: 4x – 14 = 2x + 16

Prove: x = 15


Given: AD  BE

Prove: AB  DE

A

B

C

D

E


Given: 2 is complimentary to 1

3 is complimentary to 4

2  4

Prove: 1  3

4

2

3

1


Given: Two intersecting lines

Prove: 1  3

2

1

3

4

(i.e., Prove the Vertical Angle Theorem!)


Summary & Homework

  • Summary:

    • Proofs are a step-by-step deductive reasoning approach to problem solving using definitions, theorems, postulates and givens.

  • Homework: study for Quiz


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