In the adjoining figure, prove that ABCD is a parallelogram. Also find its area.

In the adjoining figure, show that ABCD is a parallelogram. Calculate the area of ||gm ABCD.

In the adjoining figure, ABC is a parallelogram. The /_ABD is

ABCD is a quadrilateral and BD is one of its diagonals as shown in the figure. Prove that ABCD is a parallelogram and find its area.

ABCD is a quadrilateral and BD is one of its diagonals, as shown in the figure. Prove that quadrilateral ABCD is a parallelogram, also find its area.

In the adjoining figure, ABCD is a parallelogram. find the measure of angleBCE .

In the adjoining figure, ABCD is a parallelogram. Then its area is equal to

ABCD is a quadrilateral and BD is one of its diagonals as shown in Figure.Show that ABCD is a parallelogram and find its area.

In the adjoining figure, ABCD is a parallelogram and P is any points on BC. Prove that ar(triangleABP)+ar(triangleDPC)=ar(trianglePDA) .

In the adjoining figure, ABCD is a parallelogram , AO and BO are the bisectors of angleA and angleB respectively. Prove that angleAOB=90^@ .

In the adjoining figure, ABCD is a parallelogram. Points P and Q on BC trisect BC. Prove that ar(triangleAPQ)=ar(triangleDPQ)=(1)/(6)ar(triangleABCD) .