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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:
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.
Area of a Circle Using Diameter. The area of the circle formula in terms of the diameter is: Area of a Circle = πd 2 /4. Here 'd' is the diameter of the circle. The diameter of the circle is twice the radius of the circle. d = 2r. Generally from the diameter, we need to first find the radius of the circle and then find the area of the circle.
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. Example: What is the area of a circle with radius of 3 m ? Radius = r = 3. Area = π r2. = π × 32. = 3.14159... × (3 × 3) = 28.27 m2 (to 2 decimal places)
Oct 28, 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.
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The formula to find the area of a circle given its diameter is: A = π × (d 2)².
Feb 12, 2023 · Calculating the area of a circle requires multiplying pi by the square of the radius. If you don't have the radius, you can calculate the radius using the diameter by dividing the diameter in half.
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.
Radius. The radius of the circle is the line that joins the center of the circle to the outer boundary. It is usually represented by ‘r’ or ‘R’. In the formula for the area and circumference of a circle, radius plays an important role which you will learn later.
The formula for the area of the circle is 𝑨 = π𝒓². To work out the area of a circle: Find the value of the radius. If the diameter is given, this must be halved.
