Question

In parallelogram WXYZ, ∠W and ∠X are adjacent interior angles. The measure of ∠X is three times the measure of ∠W. Which equation gives the exact measure of ∠W?

Answer 1

Since adjacent interior angles add up to 180° and ∠X is 3 times the measure of ∠W, then it the one on the upper left corner: m∠W+ 3×m∠X=180°