Question

Construct a parallelogram $ABCD$, when :

One side $=4$ cm and one diagonal is $5$ cm.

Find the length of the other side:

Answer 1

First draw a line segment $BC=4$ cm

Make right angle at point $B$ and $C$

Open compass $5$ cm and draw a curve at point $C$.

These curve cut right angle line at point $A$.

Draw a curve at point $C$ equivalent to line $BC$ this curve cut line at point $D$.

Join $A$ and $D$.

Then $ABCD$ is the required rectangle.

The length of the other side is $3$ cm