Area = Pi times the Radius squared -- pi x r^2
Note: pi = 3.1415926535897932384626433832795
Area = 3.14159 x 8^2
Area = 201.06176 (units)^2
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Radius of a circle = 1/2 of the diameter.Area of a circle = (pi) x (radius)2For the diameter of 16-ft, radius = 8-ft, and area = (pi) (8)2 = 201.062 square feet (rounded)
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.
c=pi*8 diameter = 8 radius = 4 area = pi * 16
The circumference of a circle with an 8 cm radius is: 50.27 cm
The formula for the area of a circle is A = pi*r2, where r is the radius of the circle. So, plugging r = 8m into the formula gives: A = pi*82 = pi*64 This is approximately 201.06193 square meters.