Question

ABCD Is a parallelogran and angle b = 80 find remaining angle

Answer 1

b=d=80

a=c=180-80=100

Answer 2

ABCD is a ||gm.

We know that in a ||gm, opposite angle are equal & adjacent angle are supplementary.

Given : angle B = 80°
angle D is opposite angle.

Therefore angle D = angle B = 80°

Angle B & angle C are adjacent angles.
therefore, angle B + angle C = 180°

angle B = 80, (given)
so, angle C = 180-80 = 100°

Now, angle A = angle C = 100°. ( opposite angles )

Required answer is :
➡ angle A = 100°

➡ angle B = 80°

➡ angle C = 100°

➡ angle D = 80°

Hope it will help you !!!