The area of a square is 441 sq cm. what is length os its side?
1 Answer
Mar 10, 2018
21 cm
Explanation:
Sometimes it's helpful to look at a picture of the problem so that you can think about it easier. Here is a diagram of a square with side
How do you find the area of a square?
You multiply the length of it's side (
Since they already told us that the area is
Let's substitute that into the first equation :
CHECK: If each side is 21, then
True! So we know that the length of each side is 14.