Question

ABCD is a parallelogram the ratio of (a and (b of this parallelogram is 5:4 find measure of (b​

Answer 1

Answer:

In Paralellogram ABCD adjacent angle are 180°

i.e. /_A + /_B = 180° ___(1)

Given :- /_ A 5

____ =. __

/_ B. 4

i.e. 4/_A = 5/_B

i.s. /_ A= 5/_B/4

Putting this in (1), we get

5/_B / 4 + /_B = 180°

i.e. 5/_B + 4/_B = 720°

i.e. 9/_B =720°

i.e. /_ B = 720/9

i.e. /_B = 80°

Therefore angle B is 80 degree