A
square is a parallelogram with
4 congruent sides and
4 right angles.
Area of a square
If
s is the sidelength of a square, the area of the square is:
What is the area?
Find the side length of the square.
Use this number in the formula.
Area 
= side × side 

= 13 × 13 

= 169 
Now find the units. The lengths are measured in yards, so the area is measured in square yards.
The area is 
169 
square yards. 
What is the area when s=4?