Question

E78Find the measure of angle D.62D140 degrees16 degrees40 degrees90 degrees

Answer 1

Using the triangle sum theorem:

$\begin{gathered} \angle U+\angle V+\angle W=180 \\ 90+51+\angle W=180 \\ So\colon \\ \angle W=180-90-51 \\ \angle W=39 \end{gathered}$