Question

In a parallelogram two adjacent are in 4:5 ratio find them

Answer 1

Sum of the adjacent angles in any parallelogram= 180

ratio of adjacent angles = 4:5 (given)

let first angle = 4x

second angle = 5x

4x+5x=180

9x=180

x=180/9

x= 20

therefore

required angles are

first angle = 4x= 4*20 =80

second angle = 5x= 5*20 =100

Answer 2

We know,

sum of adjacent angles in a parallelogram is 180°.

So, 4x + 5x = 180°

or, 9x=180°

or, x=180°/9=20°

Therefore, the angles are

4×20=80°and

5×20=100°