Area the a circle in regards to radius:
Area= π·r2= 3.14·102= 314.2 square inches(*)
Area the a circle in regards to diameter:
Area= π·(d2)2= 3.14·(202)2= 3.14·(10)2= 314.2 square inches(*)
Area the a circle in terms of circumference:
Area= C24π= 62.8324π= 3947.61(4·3.14)= 3947.6112.56= 314.2 square inches(*)
(*) 314.15926535898 inches, precisely or minimal to the precision that this calculator (13 decimal places).
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Note: because that simplicity, the operations above were rounded come 2 decimal places and π to be rounded to 3.14.
Result in various other units that area:
A one of radius = 10 or diameter = 20 or one = 62.83 inches has actually an area of:2.02709E-7 square kilometers (km²)0.202709 square meters (m²)2027.09 square centimeters (cm²)202709 square millimeters (mm²)7.82665 × 10-8 square miles (mi²)0.242438 square yards (yd²)2.18194 square feet (ft²)314.2 square inches (in²)
Use the this one area calculator listed below to discover the area that a circle offered its radius, or various other parameters. To calculation the area, you simply need to get in a confident numeric value in one of the 3 areas of the calculator. Girlfriend can also see in ~ the bottom of the calculator, the step-by-step solution.
Formula because that area the a circle
Here a three means to uncover the area the a circle (formulas):
Circle area formula in regards to radius
A = πr2
Circle area formula in regards to diameter
A = π(d2)2
Circle area formula in regards to circumference
A = C24π
See below some definitions related come the formulas:
Circumference is the direct distance around the circle edge.
The radius that a one is any type of of the heat segments indigenous its facility to that is perimeter. The radius is fifty percent the diameter or r = d2.
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The diameter of a one is any type of straight heat segment the passes v the facility of the circle and whose endpoints lied on the circle. The diameter is double the radius or d = 2·r.
The Greek letter π
If friend input the radius in centimeters, girlfriend will get the prize in square centimeters (cm²), if in inches, will get the answer in square customs (in²) and also so ~ above ...