Question

A figure is said to be regular if its sides are equal in length and angles are equal in measure. Can you identify the regular quadrilateral?

Answer 1

As all the sides are equal.

And all angles are equal = $\frac{(2n-4)\times 90}{4}$

hence each angle=$\frac{(2\times 4-4)\times 90}{4}=90$

Thus the four sided regular quadrilateral is a square.