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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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   You can find the diameter of a circle by multiplying the radius of a circle by two: Diameter = 2 × Radius. 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:

   • 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

     Let's find out how to use this segment area calculator. In...

   • Circumference to Diameter Calculator

     Suppose you want to find the circumference of a 5 cm...

   • Circle Formula Calculator

     The circle formula calculator allows you to make circle...

   • Arc Length Calculator

     This arc length calculator is a tool that can calculate the...

   • Surface Area Calculator

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

   • Sphere Volume Calculator

     A sphere is a perfectly round geometrical 3D object. The...

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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   Task 1: Given the radius of a circle, find its area. For example, if the radius is 5 inches, then using the first area formula calculate π x 5 2 = 3.14159 x 25 = 78.54 sq in. Task 2: Find the area of a circle given its diameter is 12 cm. Apply the second equation to get π x (12 / 2) 2 = 3.14159 x 36 = 113.1 cm 2 (square centimeters).

3. www.inchcalculator.com › circle-area-calculatorArea of a Circle 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.

4. www.calculatorsoup.com › calculators › geometry-planeCircle Calculator

   www.calculatorsoup.com › calculators › geometry-plane

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   6 lut 2024 · Calculate the area, circumference, radius and diameter of circles. Find A, C, r and d of a circle. Given any 1 known variable of a circle, calculate the other 3 unknowns.

5. www.calculateme.com › shape-area › circleCalculate the Area of a Circle

   www.calculateme.com › shape-area › circle

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   This calculator will calculate the area of a circle given its diameter, using the famous formula area = pi times (d/2) squared. It supports different units such as meters, feet, and inches.

6. www.wikihow.com › Calculate-the-Area-of-a-Circle5 Ways to Calculate the Area of a Circle - wikiHow

   www.wikihow.com › Calculate-the-Area-of-a-Circle

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   28 paź 2024 · You can find the area of a circle using the radius, the diameter, or the circumference. To find the area using the radius, or the length from the center of the circle to the edge, use the formula area = πr^2, where r is the radius.

7. mathcracker.com › area-circle-diameterArea of a Circle from diameter - MathCracker.com

   mathcracker.com › area-circle-diameter

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   This calculator will allow you compute the area of circles, provided that you provide the diameter. The diameter provided needs to be any valid positive expression. It could be a number like '2', it could be a fraction like '3/4' or it could a expression involving square roots, like '3sqrt (3)'.