ABCD is a rhombus. RABS is a straight line such that RA = AB = BS. Prove that RD and SC when produced meet at right angles.

A B C D is a rhombus, E A B F is a straight line such that E A=A B=B F . Prove that E D and F C when produced meet at right angles.

A B C D is a rhombus, E A B F is a straight line such that E A=A B=B F . Prove that E D and F C when produced meet at right angles.

A B C D is a rhombus, E A B F is a straight line such that E A=A B=B F . Prove that E D and F C when produced meet at right angles.

ABCD is a parallelogram. Side AB is produced on both sides to E & F as in figure such that BE = BC & AF = AD. Show that EC & FD when produced meets at right angle.

Given : ABCD is a rhombus, DPR and CBR are straight lines. Prove that : DP xx CR = DC xx PR .

In the figure ABCD is a llgm and E is the mid point of BC. Also DE and AB when produced meet at F then

In the pentagon ABCDE, angle A= 110^(@) , angle B= 140^(@) and angle D= angle E. The sides AB and DC, when produced, meet at right angle. Calculate angles BCD and E.