Complete the two-column proof.
drawing not to scale.
given: ∠2 ≅ ∠4, m∠2=110°
prove: ∠3=70°

(a) Substitution Property of Equality

(b) Definition of Supplementary Angles

(c) Subtraction Property of Equality

Step-by-step explanation:

1. - Given

2. - Definition of congruent angles

3. - Substitution Property of Equality (a)

4. and are a linear pair - Definition of a linear pair (shown in diagram)

5. and are supplementary - Linear Pair Postulate

6. - Definition of Supplementary Angles (b)

7.   - Substitution Property

8. - Subtraction Property of Equality (c)