Answered

∠ABC and​ ∠DEF ​are supplementary.

m∠ABC=138°

What is the measure of ​ ∠DEF ​?


42°

90°

​​138°

180°

Verified Answer :

As the angles are supplementary, their sum would be equal to 180
∠ABC + ∠DEF = 180
138 + ∠DEF = 180
∠DEF = 180 - 138
∠DEF = 42

In short, Your Answer would be Option A

Hope this helps!

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