Square Root Problem: Finding Side Length When Area is 169

Question

A square has an area of 169.

How long are its sides?

00:00 Find the side of the square

00:03 Use the formula for calculating the area of a square (side squared)

00:09 Substitute appropriate values and solve for the side

00:13 Take the square root

00:23 And this is the solution to the question

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

We substitute the data into the formula:

$169=L^2$

We calculate the root:

$\sqrt{169}=a$

$L=13$

$13$