Question

in a parallelogram ABCD angle A is equal 100 degree find the measure of Angle B and angle d​

Answer 1

As we know the measures of all the interior angles of parallelogram = 360 degrees
Thus as given in the question
/_A= 100 degrees
then as per rule : the adjacent angles of a parallelogram are supplementary (180)
then
/_B = 180-100
=80
then now as we know vertically opposite angles of a parallelogram are equal
then
/_D = 80 ; as /_B = 80

Answer 2

Hey there!

Answer:

∠B = ∠D = 80°

Step-by-step explanation:

Given,

∠A = 100°

Now,

∠A + ∠D = 180°   (adjacent ∠s in ||gm are supplementary)

100 + ∠D = 180

∠D = 180 - 100

∠D = 80°

And,

∠B = ∠D   (opposite ∠s of ||gm are equal)

∠B = 80°

Hope It Helps You!