Question

State whether the following quadrilaterals are parallelogram or not. Give reason.

Answer 1

In fig...

(b)

Quadrilateral is parallelogram ..

Because ln parallelogram opposite side are equal...

ln fig

(c)

Quadrilateral is parallelogram ..

Because opposite angel of parallelogram are equal.

In fig.

(d)

Quadrilateral is parallelogram ..

Because opposite sides of parallelogram are parallel and equal to each other...

they made a alternate interior angle.....

hope you understand this...

This is my own answer.....

not copying other...

Answer 2

(b)

Quadrilateral is parallelogram ..

Because ln parallelogram opposite side are equal...

ln fig

(c)

Quadrilateral is parallelogram ..

Because opposite angel of parallelogram are equal.

In fig.

(d)

Quadrilateral is parallelogram ..

Because opposite sides of parallelogram are parallel and equal to each other...