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The area of a circle with a 13 ft diameter is: 132.7 square feet.
Area = pi*r2diameter/2 = r ( radius )14 ft/2 = 7 ftso,Area = (3.14)(7 ft)2= 154 ft2=======
Area of a circle = pi*radius2
If the circle is 20 ft radius, the area is π·20² = 1256.637 ft² If the circle is 20 ft diameter, the area is π·(20/2)² = 314.1593 ft² If the circle is 20 ft circumference, the are is π·(20/2π)² = 63.66198 ft²
Circumference of the circle = 7*pi feet