Question

#2 Find angles B, C, D B c * 60 - 2 D A) 120, 60, 60 B) 60, 60, 60 C) 120, 120, 60 D) 60, 60, 120

Answer 1

$\begin{gathered} \angle A+\angle B=1\text{80 (supplementary angle)} \\ 60^{\circ}+\angle B=180^{\circ} \\ \angle B=180^{\circ}-60 \\ \angle B=120^{\circ} \end{gathered}$$\begin{gathered} The\text{ base of the trapezium are congruent} \\ \angle B\cong\angle C \\ \angle C=120^{\circ} \end{gathered}$$\angle D=60^{\circ}$

The answer is C.