Find the area of a circle free online Math quizzes

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The circle is one of the key shapes in the topics under geometry. It is therefore important to know what all features exist in a circle and what are all the possible calculations that can be done on them. A circle has the most basic element as the radius. The radius defines the distance between the center to any point on the circle. The area of a circle is calculated by using the formula that relies on the radius. The quiz here displays various circles of different radii and the child has to find out the area of each.

How to find area of a circle?

A circle is a shape with all points the same distance from the center. This distance is called the radius of the circle. To find the area of a circle, you need to know the radius of the circle.

The formula for finding the area of a circle is:

Area = π x radius^2

The symbol “π” (pronounced “pi”) is a special number that is approximately equal to 3.14. It is used in many math formulas, including the formula for finding the area of a circle.

To find the area of a circle, you start by measuring the radius of the circle. Let’s say the radius of the circle is 5 cm. Now you can use the formula to find the area of the circle. Plugging in the value for the radius, we get:

Area = π x 5 cm^2 = 25 cm^2

This means the area of the circle is 25 square centimeters.

Here’s another example:

Imagine you have a circle with a radius of 8 cm. To find the area of this circle, you would use the formula:

Area = π x 8 cm^2 = 50.24 cm^2

So the area of this circle is approximately 50.24 square centimeters.

It’s important to remember that the radius of a circle is always a straight line from the center of the circle to the edge. So if you wanted to, you could use a different straight line as the radius and the area of the circle would be different.