Question

ABCD is parallogram the ratio of A and B of the parallogram is 5:4 find the measure of B​

Answer 1

Answer:

Let the common multiple of the given ratio then

∴∠A=5x and∠B=4x

ABCD is a parallelogram.

∴∠A+∠B=180

[Adjacent angle of parallelogram are supplementary]

∴5x+4x=180

⇒9x=180

⇒x=180/9

⇒x=20

∠B=4x=4×20° =80°

ans-The measure of ∠B is 80°