Question

What is the length of each side of a square that has the same area as a rectangle that is 12 mm long and 18 mm wide? Round to the nearest whole number.

Answer 1

the side of the square is around 14mm




first, find the area of the rectangle :
$12 \times 18 = 216$

if they have same area, so the area of the square is equal to 216mm^2


now find the square root of the area
$\sqrt{216} = 14.69$






good luck