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

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

    6 dni temu · Use the formulas to calculate the circumference and area: c = 2πr and A = πr². The circumference should equal c = 2π × 8 cm = 50.265 cm. The area should equal A = π × (8 cm)² = 201.06 cm². To check your results, input the 8 cm radius in the calculator. The results should also be 50.265 cm and 201.06 cm².

  3. www.omnicalculator.com › math › circle-formulaCircle Formula Calculator

    6 dni temu · Input the radius in the circle area formula: A = π × (3 cm)² = 28.2743 cm². Also, input the radius in the circumference formula: c = 2π × (3 cm) = 18.8496 cm. Check your results with the circle formula calculator. The results should also be 28.2743 cm² and 18.8496 cm for area and circumference.

  4. www.omnicalculator.com › math › circleCircle Calculator

    3 dni temu · This area of a circle calculator will help you determine the circumference, diameter, area, and radius of any circle. In the article below, you will find all the circle formulas you will ever need to calculate one of these values.

  5. www.calconi.com › en › circleCalculate circle - area circumference radius diameter

    Diameter: d = 2 × r. Radius: r = ½ × d. Circumference: C = 2 × r × π or C = d × π. Area: A = r² × π or A = (d² × π)/4 = ¼ × d² × π. Input 'help' for the Circle Calculator to calculate radius, diameter, circumference and area. The calculator for circle calculation contains several input fields, which are explained in more detail below: Size unit.

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

    Once you have the radius you times the radius by 2 and times it by pie and then you get the circumference. Here are the two different formulas for finding the circumference: C = πd

  7. www.calculator.net › circle-calculatorCircle Calculator

    This calculator computes the values of typical circle parameters such as radius, diameter, circumference, and area, using various common units of measurement.