Question

justify your answer for the following statements. (1) three angles of a quadrilateral abcd are equal. is it a parallelogram? why or why not? (2) diagonal ac and bd of a quadrilateral abcd intsect each other at o such that oa :oc
=3:2 is abcd a parallelogram?(3)abcd is a parallelogram. if it's diagonal are equal value of angle anc​

Answer 1

Answer:

It is not a parallelogram, 

because in a quadrilateral ABCD, we may have ∠A=∠B=∠C=80∘ and ∠D=120∘. 

Here, ∠B=∠D.

Since the opposite angles are not equal,

 ABCD is not a parallelogram.

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