Question

1. ABCD is parallelogram the ration of angle A and angle B of this parallelogram is 5:4. Find the measure of angle B​

Answer 1

Answer:

5x+4x=180

9x=180

x=180/9

x=20

20*4=80

Step-by-step explanation:

the answer is 80°

Answer 2

Answer: angle B = 80 degree

Step-by-step explanation: in a parallelogram, the adjacent angles are supplementary. x = hcf of both the angles

5x + 4x = 180 degree

9x = 180 degree

x = 180/90

x = 20 degree

now,angle a (5x= 5 * 20 = 100degree)

       angle b (4x = 4* 20 =  80degree)

hope this helps!