Question

A square has an area of 100cm2. what is the perimeter? show your working.

Answer 1

Area of square = $a^{2}$ (a is the side of the square)

100 = $a^{2}$

$\sqrt{100}$ = a

a = 10 cm


Perimeter of a square = 4a

=4 ( 10 )

=40cm

Answer 2

side of the square=a
area=a²
a²=100
a=10
perimeter= 4a
=4*10
=40 cm