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1. www.omnicalculator.com › math › area-of-a-circleArea of a Circle Calculator

   www.omnicalculator.com › math › area-of-a-circle

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   1 dzień temu · The formula to calculate the area of a circle using radius is as follows: Area of a circle = π × r2. And, to calculate the area of a circle using diameter use the following equation: Area of a circle = π × (d/2)2. where: π is approximately equal to 3.14.

   • Semicircle Area Calculator

     With this semicircle area calculator, you can quickly find...

   • Central Angle Calculator

     In this model, the Sun is at the center of the circle, and...

   • Segment Area Calculator

     In our example, we want to find the area of the...

   • Circumference to Diameter Calculator

     Diameter and circumference are lengths related to each other...

   • Circle Formula Calculator

     Suppose you have a circle of radius 3 cm. If you want to...

   • Arc Length Calculator

     The units will be the square root of the sector area units....

   • Surface Area Calculator

     Our surface area calculator can find the surface area of...

   • Sphere Volume Calculator

     Upon doing so, our calculator will display the spherical cap...

2. www.gigacalculator.com › calculators › area-of-circle-calculatorArea of a Circle Calculator

   www.gigacalculator.com › calculators › area-of-circle-calculator

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   Free online area of a circle calculator which helps you calculate the are of any circle, given its radius. Supports many different metrics such as in, ft, yd, mm, cm, meters, etc.

3. www.omnicalculator.com › math › circumference-area-circleCircumference and Area of a Circle Calculator

   www.omnicalculator.com › math › circumference-area-circle

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   6 dni temu · These are the formulas to calculate the circumference and area of a circle: c = 2πr A = πr² = πd²/4. where: c stands for circumference; r for radius; and; d for the diameter of the circle. π is a constant approximately equal to 3.14159265359 and, among other things, represents the circumference-to-diameter ratio of any circle.

4. www.mathsisfun.com › geometry › circle-areaArea of a Circle - Math is Fun

   www.mathsisfun.com › geometry › circle-area

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   Calculator. Enter the radius, diameter, circumference or area of a Circle to find the other three. The calculations are done "live": How to Calculate the Area. The area of a circle is: π ( Pi) times the Radius squared: A = π r2. or, when you know the Diameter: A = (π/4) × D2. or, when you know the Circumference: A = C2 / 4π.

5. www.math-salamanders.com › area-of-a-circle-calculatorArea of a Circle Calculator - Math Salamanders

   www.math-salamanders.com › area-of-a-circle-calculator

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   We explain how to find the area of a circle and provide a quick calculator to work it out for you, step-by-step. There is also a separate calculator which will find the radius and diameter of a circle, if you already know the area.

6. www.cuemath.com › geometry › area-of-a-circleArea of a Circle - Formula, Derivation, Examples - Cuemath

   www.cuemath.com › geometry › area-of-a-circle

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   The formula for the area of a circle is A = πr 2, where r is the radius of the circle. The unit of area is the square unit, for example, m 2, cm 2, in 2, etc. The area of a circle formula is useful for measuring the region occupied by a circular field or a plot.

7. www.inchcalculator.com › circle-area-calculatorArea of a Circle Calculator - Inch Calculator

   www.inchcalculator.com › circle-area-calculator

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   Calculate the area of a circle given the radius, diameter, or circumference. Plus learn the formulas and steps to find a circle's area.