Area = pi*radius squared
11 in = pi*r^2
divide both sides by pi
3.50 in = r^2
take square root of each side
1.9 inches = radius
When you try to figure out an area of a circle, you square the radius, then multiply it by pi to get the area of a circle. A radius square is radius x radius, or radius squared.
The area of any circle is (pi) x (radius)2 .The area of half the circle is just half of that number.
A circle with a radius of 2.5 meters has an area of 19.63 square meters.
A circle with a radius of 10 feet has an area of 314.16 square feet.
A circle with a radius of 9 feet has an area of 254.47 square feet.
A circle with a radius of 11 inches has an area of 380.13 square inches.
A circle with a radius of 11m has an area of ~380.13 m2
The radius of a circle with an area of 380 sq inches is 11 inches.
Using 3.14 as Pi the area of circle is: 379.94
The area of a circle is: pi times radius squared
A = 380 square feet.
area of a circle is pi times radius squared. the radius is 11 feet. the area ofthe circle would be 380ft2 since it is a half circle you take half of 380... your answer is 190ft2
Area of the circle: pi*11^2 = 121*pi square units
5.5 is the radius.
The area of a circle is calculated using the formula ( A = \pi r^2 ), where ( r ) is the radius. For a circle with a radius of 11 miles, the area is ( A = \pi (11)^2 = 121\pi ) square miles. Using ( \pi \approx 3.14159 ), the exact area is ( 121\pi ) square miles, or approximately 380.132 square miles when calculated numerically.
Using 3.14 as Pi the area of circle is: 0
The area of a circle of radius 21 is 1386