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Area of a circle = pi*radius2

Area = pi*212 = 1385.44236 square units

Q: What is area of a circle with a diameter of 42?

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A circle with a radius of 21 yards has an area of 1,385.44 square yards.

1,385.4 square cm

Area = pi*42 = 50.265 feet to 3 d.p.

Area in square meters = pi*42

Area = 1/4*Pi*d21/4*3.14*42 = about 12.56cm2

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1385.44 square whatevers

A circle with a radius of 21 yards has an area of 1,385.44 square yards.

1,385.4 square cm

Area: pi*212 = 441*pi square units

Area = pi*42 = 50.265 feet to 3 d.p.

Area = pi*42 = 50.265 square meters to 3 d.p.

Area in square meters = pi*42

50.2656 square inches The formula to find the area of a circle is ∏r2. Where ∏ is the mathematical constant and r is the radius of the circle. So 3.14 x 42. = 50.27 square cm or yds, (whatever the diameter was in).

Area = 1/4*Pi*d21/4*3.14*42 = about 12.56cm2

The circumference of a 42-inch diameter circle is: ~131.95 inches.

The diameter of a circle with an area of 37.68 is 6.92

13.375