Question

how rectangle is formed and proof

Answer 1

A rectangle is a quadrilateral with four right angles( 90° on each side) and equal opposite sides.

The angles of a rectangle are equal so it is defined as an equiangular quadrilateral

both pairs of opposite sides of a rectangle are parallel and equal in length.

Draw a 2cm sleeping line AB. Measure and 90° from A and  B. Draw 3cm line from A and B to their own marks. Now mark 3cm length with C and D and join CD with a line. Now you measure the length of from C to D, it will be 2cm and measure C and D angles also. They also will be 90°