gwendolyn7 gwendolyn7

11-01-2017
Mathematics

Answered

If ∠C and ∠D are vertical angles and m∠C=x and m∠D=−3x+80, what is m∠C?

I'm super lost, can someone help?

Verified Answer :

11-01-2017

Vertical angles are equal to each other, so:

\(x=-3x+80 4x=80 \tfrac{80}{4} = x x=20\)

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