Complete the formal proof of the theorem.If the exterior sides of two adjacent acute angle...

Given:

Prove:

∠1 is comp. to ∠ 2

PROOF

Statements

Reasons

1.

1. ?

2. ?

2. If two rays are ⊥, then they meet to form a rt. ∠

3. m ∠ ABC = 90

3. ?

4. m ∠ ABC = m ∠ 1 + m ∠ 2

4. ?

5. m ∠ 1 + m ∠ 2 = 90

5. Substitution

6. ?

6. If the sum of the measures of two angles is 90, then the angles are complementary