Find the area of a square of 9 cm

GIven: Square of the edge of 9 cm

To find: Area of the square

Solution:

Area of a square of side 'a' units is a$ \times $a = a² square units.

In the given square, the space shaded in brown is the area of the square. 

Area$=a^2$

= 9$ \times $9

= 81 sq cm