mator12
contestada

∠1 ≅ ∠2
m∠1 = m∠2
m∠2 + m∠3 = 180
m∠1 + m∠3 = 180
∠1 and ∠3 are supplementary angles.

Find the words that fit each one
Definition of Congruence
Substitution Subtraction
Property of Equality
Definition of Supplementary
Vertical Angles Theorem