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Writing Proofs 2
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Result
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Consider the following:

Given: ∠1 and ∠2 form a linear pair.
∠3 and ∠4 form a linear pair.
∠1≅∠3
Prove: ∠2≅∠4

An incomplete proof is shown below. Choose the answers to the questions below the proof.

1. Which of the following should be the reason for statement 2?
Definition of supplementary angles
Linear Pair Postulate
Supplement Theorem
None of the options
Answer: Linear Pair Postulate
2. Which of the following should be statement 3?
∠1≅∠2
∠1≅∠3
∠1≅∠4
None of the options
Answer: ∠ 1 ≅ ∠ 3
3. Which of the following should be the reason for statement 4?
Transitive Property of Congruence
Linear Pair Postulate
Supplement Theorem
None of the options
Answer: Supplement Theorem
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