Question

ABCD is a parallelogram in which angleA = 60°, then find angleD​

Answer 1

In parallelogram opposite angles are equal.

Hence angle A = angle C = 60°

Sum of adjacent angles = 180°

Angle A + angle B = 180°

Angle B = 180° - 80°

Hence angle B = angle D = 100°

Answer

Angle D = 100°