area = pi * r2
area = 3.1416 * (100 ft)2
area = 31,416 ft2
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The formula for the area of a circle is pi (3.141265...) times the radius squared. Since half of the diameter is the radius, plug that number into the formula to get the total square feet.
Area of a circle: pi times radius squared
Area = pi*r2where r is the radius of the circle.A 2-foot circle has a radius of 1 ft so area = pi square feet ie 3.14 sq feet, approx.Area = pi*r2where r is the radius of the circle.A 2-foot circle has a radius of 1 ft so area = pi square feet ie 3.14 sq feet, approx.Area = pi*r2where r is the radius of the circle.A 2-foot circle has a radius of 1 ft so area = pi square feet ie 3.14 sq feet, approx.Area = pi*r2where r is the radius of the circle.A 2-foot circle has a radius of 1 ft so area = pi square feet ie 3.14 sq feet, approx.
acre = 43,560 square feet = 4,840 square yardsArea of a circle = (pi)·(radius)2 = (pi)·(200)2 = 125,663.7 square yards = 25.964 acres (rounded)
A circle with a radius of 10 meters has an area of 314 square meters.