Question

ABCD is a parallelogram. If angle a is equal to 70 degrees, find the measure of

side B.​

Answer 1

Step-by-step explanation:

MATHS

MEDIUM

Is quadrilateral ABCD a parallelogram, if ∠A=70

∘

and ∠C=65

∘

? Give reason.

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ANSWER

Answer: Quadrilateral ABCD is not a parallelogram.

In a parallelogram, the opposite angles must be equal.

So, if ABCD is indeed a parallelogram, then angle A and angle C being opposite angles must be equal.

However, as stated in question, angle A = 70 degrees

and angle C = 65 degrees.

Thus angle A and angle C are not equal.

Hence, the condition that opposite angles must be equal is not met. Hence there is a contradiction to our assumption. Hence, quadrilateral ABCD is not a parallelogram.

Answered By yadavjii64

Answer 2

answer is 110°

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