Question

ABCD is a parallelogram. the ratio o<A and<B of these parallelogram is 5:4. find the measure of <B
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Answer 1

Answer:

80

Step-by-step explanation:

We know that the adjacent sides of a parallelogram are 180°

Let's take A:B as 5x and 4x respectively,

as Angle A and Angle B are 180

they can be written as

A+B=180

or

5x + 4x= 180

by solving we get

x= 180/9

x= 20

Now, as we had taken angle B as 4x

we can write it as the follwing

4(20)

that is 80...

hence <B =80

Answer 2

Step-by-step explanation:

angle A and B are supplementary it means their sum will be 180°

so let angle A = 5x and angle B = 4x

now

4x+5x = 180

9x = 180

x = 20

now angle A = 5x = 5*20 = 100°

and angle B = 4x = 4*20 = 80°

I m not sure about the answer so u can recheck it.