choose a calculation find A, C and d | offered r discover C, r and d | offered A find A, r and d | given C discover A, C and also r | given d


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Solutions< extbfdiameter , d = 2r >< extbfcircumference , C = 2 pi r >< extbfarea , A = pi r^2 >
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Circle Shape

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r = radius d = diameter C = circumference A = area π = pi = 3.1415926535898 √ = square root

Calculator Use

Use this one calculator to uncover the area, circumference, radius or diameter that a circle. Given any kind of one change A, C, r or d that a one you have the right to calculate the various other three unknowns.

Units: note that systems of length are shown for convenience. They carry out not influence the calculations. The units room in location to give an clues of the order of the results such together ft, ft2 or ft3. Any type of other basic unit can be substituted.

Circle formulas in terms of Pi π, radius r, and also diameter d

Radius and also Diameter:

r = d/2 d = 2r

Area that a circle:

A = πr2 = πd2/4

Circumference that a circle:

C = 2πr = πd

Circle Calculations:

Using the formulas above and additional formulas you can calculate nature of a offered circle for any type of given variable.

Calculate A, C and d | given r provided the radius the a circle calculate the area, circumference and also diameter. Putting A, C and also d in regards to r the equations are:

Calculate r, C and also d | offered A offered the area the a circle calculation the radius, circumference and diameter. Placing r, C and also d in terms of A the equations are:

< d = 2r = 2 sqrtfracApi >

Calculate A, r and d | offered C offered the circumference of a circle calculation the radius, area and diameter. Placing A, r and d in regards to C the equations are:

Calculate A, C and r | offered d offered the diameter the a circle calculation the radius, area and also circumference. Placing A, C and r in regards to d the equations are: