Question

What is the area of a circle if the radius is 9 m​

Answer 1

(approximately) 254.34 meters

Explanation:

Concepts:

• Area is the amount of space a 2D shape has.

• The area of a circle is the amount of space it has. The formula to find the area is πr^2, where r is the radius and π is often represented as 3.14 or 22/7.
• The radius of a circle is a straight line from the center to the circumference of it. The radius is 1/2 of the diameter, meaning the diameter of a circle is a straight line passing from one side to the other side of the circle.

Solving:

Let's use the formula for area of a circle to solve.

1. Formula for Area of a Circle

• πr^2

2. Exchange π for 3.14

• 3.14 · r^2

3. Plug in the value of r (radius of circle) as 9

• 3.14 · 9^2

4. Simplify

• 3.14 · 81
• 254.34

Therefore, the area of a circle when the radius is 9 meters is approximately 254.34 meters.