Areas

Square

A square is a parallelogram with 4 congruent sides and 4 right angles.

Area of a square
If l is the side-length of a square, the area of the square is:

$Area=l\;\cdot\;l\;\;\;\;\;\;That\;is:\;\;A=l\fs2^2$

Find the area of the square having side-length 9

Area=