Question

Construct a rectangle whose adjacent sides are 8 cm and 3 cm.

Answer 1

Draw a line segment AB of length 8 cm.
Construct $\angle$BAX = 90° at point A and $\angle$ABY = 90° at point B.
Using a compass and ruler, mark a point D on the ray AX such that AD = 3 cm
Similarly mark a point C on the ray Y such that BC = 3 cm
Draw the line segment CD.
ABCD is the required rectangle.