Question

• In a parallelogram ABCD, If angle A = 4/5 of angle B, the find the measure of angle A? ​

Answer 1

Answer:

Measure of angle A = 80 °

Step-by-step explanation:

In Parallelogram,

Sum of adjacent angles are 180°

so

angle A + angle B = 180

but angle A = 4/5 angle B

angle B = 5/4 angle A

then

angle A + 5/4 angle A = 180

9/4 angle A = 180

angle A = 180×4/9

angle A = 80