Question

Which property is the reason for number 3?

1. ∠ABC ≅ ∠DEF Given

2. ∠HGI + ∠ABC = 180° Given

3. ∠HGI + ∠DEF = 180°

Select one:
a. Subtraction Property of Equality
b. Reflexive Property of Equality
c. Substitution Property of Equality
d. Segment Addition Postulate

Answer 1

It is solution c. You substitute ABC for DEF.