Area of a Circle
|
The area of a circle really means the area enclosed by the circle. The area is found by multiplying π times the radius squared. |
Example:
Find the area of a circle with radius 7 ft.
Solution:
A = πr2 = π(7)2 = 49π ≈ 153.94 ft2
Example:
Find the area of a circle with radius 10 in.
Solution:
A = πr2 = π(5)2 = 25π ≈ 78.54 in2
Example:
Find the radius of a circle with area 113.10 cm2.
Solution:
A = πr2
113.10 = πr2 *Divide by π.
36 = r2
6 = r
