Q.3 Draw a circle and any two of its diameters. If you join the ends of these diameters, what is the figure obtained? What figure is obtained if the diameters are perpendicular to each other? How do you check your answer?

(i) By joining the ends of two diameters, we get a rectangle. By measuring, we find AB = CD and BC = AD i.e., pairs
of opposite sides are equal and also \(\angle \) A = \(\angle \) B = \(\angle \) C = \(\angle \) D = 90 ,

, i.e. each angle is of 90 .

Henc,e it is a rectangle.
(ii) If the diameters are perpendicular to each other, then by joining the ends of two diameters, we get a square.
By measuring, we find that AB = BC = CD = DA = i.e.,
all four sides are equal.
Also ? A = ? B = ? C = ? D = 90 ,

, i.e. each angle is of 90 .

Hence, it is a square.