Complete the formal proof of the theorem.If two angles are complementary to the same angle...

Given:

∠1 is comp. to ∠ 3

∠ 2 is comp. to ∠ 3

Prove:

∠1 ≅ ∠ 2

PROOF

Statements

Reasons

1. ∠1 is comp. to ∠ 3

∠ 2 is comp. to ∠ 3

1. ?

2. m ∠ 1 + m ∠ 3 = 90

m ∠ 2 + m ∠ 3 = 90

2. ?

3. m ∠ 1 + m ∠ 3 = m ∠ 2 + m ∠ 3

3. ?

4. m ∠ 1 = m ∠ 2

4. ?

5. ∠ 1 ≅ ∠ 2

5. ?