Question

. In a parallelogram ABCD, m∠A=x° and m∠B=(3x+20)°, find m∠C and m∠D.​

Answer 1

Answer:

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Answer 2

Answer:

In parallelogram ABCD,

Angle A + Angle B = 180°

(Adjacent angles of parallelogram)

x + 3x + 20° = 180°

4x = 180° - 20°

x = 160°/4

x = 40°

Now,

Angle A = x = 40°

Angle B = 3x +20° = 120°+20° = 140°

Angle A = Angle C = 40°

Angle B = Angle D = 140°

(Opposite angles in a parallelogram)