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30 lip 2024 · 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
Now that you know how to find circumference from diameter...
- Circle Formula Calculator
Input the radius in the circle area formula: A = π × (3 cm)²...
- Arc Length Calculator
We can find the area of a sector of a circle in a similar...
- 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...
- Semicircle Area Calculator
Formula to Calculate Surface Area of a Circle. Example 1: Calculate the surface area of a circle whose radius is 21 cm. Therefore, the surface area of the circle is 1386 cm² . Example 2: Calculate the S.A of a circle if its diameter is 98cm. Hence, the area of the circle is 7,546cm 2. How to calculate the surface area of a circle using its radius.
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.
The area of a regular polygon is half its perimeter multiplied by the distance from its center to its sides, and because the sequence tends to a circle, the corresponding formula–that the area is half the circumference times the radius–namely, A = 1 2 × 2πr × r, holds for a circle.
Area of a circle formula. The formula for the area of a circle is π x radius2, but the diameter of the circle is d = 2 x r 2, so another way to write it is π x (diameter / 2)2. Visual on the figure below:
Understand that you can easily determine the area of a circle using the formula Area = π × r^2, where π is approximately 3.14, and r represents the radius of the circle. Note that radius is half the diameter of a circle.
3 sie 2023 · The area of a circle can be calculated using three different formulas. The formulas are used based on whether the radius, diameter, or circumference is known to us. Each of the three situations is discussed below with their formulas and solved examples.
