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  1. www.omnicalculator.com › math › radius-of-a-circleRadius of a Circle Calculator

    3 dni temu · There are three circle radius formulas, depending on what number you know: The radius of a circle from the area: if you know the area A, the radius is r = √(A / π). The radius of a circle from circumference: if you know the circumference c, the radius is r = c / (2 × π).

  2. www.khanacademy.org › cc-7th-area-circumference › aRadius, diameter, & circumference | Circles (article) | Khan...

    Learn the relationship between the radius, diameter, and circumference of a circle.

  3. www.wikihow.com › Calculate-the-Radius5 Ways to Calculate the Radius of a Circle - wikiHow

    21 mar 2024 · To calculate the radius of a circle by using the circumference, take the circumference of the circle and divide it by 2 times π. For a circle with a circumference of 15, you would divide 15 by 2 times 3.14 and round the decimal point to your answer of approximately 2.39.

  4. www.omnicalculator.com › math › circle-diameterDiameter of a Circle Calculator

    3 dni temu · To calculate the radius of a circle, divide its circumference by 2π; for the circle's diameter, divide the circumference by π. Let's say that the circumference of a given circle is 20 inches. Therefore, its radius is 3.18 in, and its diameter is 6.37 in.

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

    3 dni 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.

  6. www.cuemath.com › geometry › radiusRadius of a Circle - Formula | What is Radius? | Radius Formula -...

    When the diameter of a circle is known, the formula is, Radius = Diameter/ 2. For example, if the diameter is given as 24 units, then the radius is 24/2 = 12 units. When the circumference of a circle is known, the formula is, Radius = Circumference/2π.

  7. mathmonks.com › circle › radius-of-a-circleRadius of a Circle – Definition, Formulas, Examples - Math Monks

    3 sie 2023 · How to Find the Radius of a Circle Using the Diameter. When the diameter of the circle is known, the equation to calculate the radius is derived below. As we know, Diameter (d) = 2 × radius (r) r = d/2. Let us solve an example to illustrate the concept better.

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