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What is the reason for step 5 in this proof

What is the reason for step 5 in this proof-example-1
User Ltackett
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1 Answer

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Answer:

Alternate interior angles theorem

Explanation:

DG // EF and GE is the transversal. So, alternate interior angles are congruent

Therefore, ∠HGD ≅ ∠HEF

DG // EF and DF is the transversal. So, alternate interior angles are congruent

Therefore, ∠HDG ≅ ∠HFE

User Gubatron
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