Area of a circle

Courtney Lown

The area of a circle is the product of pi and the square of the radius (r).

The radius is a segment that connects the center of the circle to the circle.

Pi= 3.14

Square the radius before you times by pi.

Example #1

The radius of this circle would be 2.

2 squared equals 4.

4 times pi (3.14) equals 12.56 m²

Area = 12.56 m²

Example #2

The radius would be 9 since the diameter is 18,

First, you square 9, then times by 3.14.

9 squared equals 81, then timed by 3.14 equals 254.34 in²

Area = 254.34 in²

Student example #1

Check your work

3 squared = 9

9 times 3.14= 28.26 cm²

Area = 28.26 cm²

Student example #2

Check your work

Seven squared = 49

49 times 3.14 = 153.86²

Area equals 153.86²

Comment Stream