Question

abcd is a parallelogram.if angle a=70degree ,calculate angle b,c,d?

Answer 1

Answer: According to the question,

Angle A = 70°

We know,adjacent angles of a parallelogram are supplementary. So,

angle A + angle B = 180°

= 70° + angle B = 180°

= angle B = 180° - 70°

= 110°

Therefore angle B is equal to 110°.

Opposite angles of a parallelogram are equal. So,

Angle A = Angle C

70° = angle C

AND

angle B = angle D

110° = angle D

Therefore, angle C = 70° and angle D = 110°.

Hence, the angles of the parallelogram are as follows:

Angle A = 70°

Angle B = 110°

Angle C = 70°

Angle D = 110°

Hope it helps.

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