Square area 49, find the side

Step by step

The question

Question: find the side s of a square with area 49 square units.

1 Write the rule

All four sides of a square are the same.

The area is side times side.

So s times s is 49: s² = 49.

Careful!

Dividing by 4 is for the perimeter.

For the area we need the number that times itself makes it.

2 Take the square root

s times s is 49.

So s is the square root of 49.

The square root of 49 is the positive number that times itself makes 49.

7 times 7 is 49.

So the side is 7.

3 Check

Let's check: side times side.

We get 49, the area.

So the side is right!

Let's look back.

First: write the rule.

Then: take the square root.

Last: check.