The area of a circle is Pi (π = 3.14) times the Radius (radius x radius = radius squared), which is written: A = π x r2 Therefore, (22×22) × 3.14 = 1519.76 square units (units is used as the measurement centimeter, feet, inches, etc, is not in the question).
The radius of a circle, if the area is 22 square meters, is: 2.646 meters.
Area = 22/7*72 = 154 square inches
A circle with a radius of 22 inches has a circumference of 138.23 inches.
That quantity is usually called "area".The area of any circle is (pi) (radius)2 .Area = (pi) (11 inches)2 = 380.133 square inches (rounded)To convert square inchage to square footage, divide by 144.380.133 square inches = 2.64 square feet (rounded)
The area of a circle is pi*r2, where r is the radius. In this case, 22/7 will be used for pi. Area of a semicircle: A semicircle is half of a circle, so the area will be half of a circle: A = (1/2)*pi*r2 Example: Find the area of a semicircle with a radius of 10 meters. A = (1/2)*(22/7)*(10)2 = (1/2)*(22/7)*(100) = 1100/7 or about 157.14 square meters Area of a quarter circle: A quarter circle is a forth of a circle, so the area will be A = (1/4)*(pi)*r2 Example: Find the area of a quarter circle with a diameter of 4 inches: (Notice that the diameter is given, so the radius in this case is 2 inches:) A = (1/2)*(22/7)*(22) = (1/2)*(22/7)*4 = 44/7 or about 6.286 square inches.
The relationship between the radius and area of a circle is as follows: Area of circle = 3.14 x Radius x Radius or 22/7 x Radius x Radius
A semicircle is half a circle, so its area is half that of a circle: radius = 1/2 diameter = 22 ÷ 2 = 11 area = 1/2πr2 = 1/2π112 ~= 190 sq in
c = 22"
Using 3.14 as Pi the area of circle is: 1519.76
Area of a circle = (pi) x (radius)2 (pi) = about 3.1416 or about 22/7 . (It can never be written down exactly.) (radius)2 = (radius) x (radius)
Area of a circle= (22/7)*r^2 where, r is the radius of the circle when r=15, area of the circle= 3.14*15*15 = 706.5 sq.units