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.