Question

writing a two-column proof
given ∠abc ≅ ∠def and
∠ghi ≅ ∠def
prove: m∠abc = m∠ghi
(there are some angle and measure related boxes and a two - column proof table with the first statement ∠abc ≅ ∠def and reason given)

Explanation:

Answer:

1. $\angle GHI \cong \angle DEF$
2. given
3. $m\angle ABC = m\angle DEF$
4. definition of congruent angles
5. $m\angle GHI = m\angle DEF$
6. definition of congruent angles
7. $m\angle ABC = m\angle GHI$
8. transitive property of equality