Square Area: Finding the Geometric Expression for ABCD

Question

Look at the square below:

Which expressions represents its area?

00:00 Express the area of the square

00:03 Side length according to the given data

00:07 Use the formula for calculating the area of a square (side squared)

00:14 Substitute appropriate values and solve to find the area

00:24 Note to square both numerator and denominator

00:31 And this is the solution to the problem

The area of a square is equal to measurement of one of its sides squared.

Below is the formula for the area of a square :

$S=a^2$

Let's now insert the known data into the formula:

$S=\frac{20^2}{y^2}=\frac{400}{y^2}$

$\frac{400}{y^2}$