Calculate Side Length: Finding Square Dimensions When Area = 900

Question

A square has an area of 900.

Ho long are its sides?

00:00 Find the side of the square

00:03 We'll use the formula for calculating the area of a square (side squared)

00:09 We'll substitute appropriate values and solve for the side

00:18 We'll take the square root

00:21 When taking a square root there are always 2 solutions

00:25 The length of the side must be greater than 0

00:31 And this is the solution to the problem

Remember that the area of a square is equal to the side of the square raised to the 2nd power.

Now, we replace the data in the formula:

$900=L^2$

We extract the root:

$\sqrt{900}=L$

$L=30$

$30$