Question

A parallelogram has one angle that measures 20°. What are the measures of the other three angles in the parallelogram?

Answer 1

Answer: < B = 160 , < C = 40 , < D = 160

Step-by-step explanation:

let <A = 20.

<C = 20 ( OPP. <S ARE EQUAL )

ANGLE SUM PROP

< A + < B +< C + <D

< B + < D = 360 - 2 < A

<B + < D  = 360 - 40

2< B = 320

< B = 160.

< D = 160. ( OPP <S ARE EQUAL )