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Area of a circle is the region occupied by the circle in a two-dimensional plane. It can be determined easily using a formula, A = πr2, (Pi r-squared) where r is the radius of the circle. The unit of area is the square unit, such as m2, cm2, etc. Area of Circle = πr2 or πd2/4, square units. where π = 22/7 or 3.14.
- Radius of a Circle
Circumference of circle = π (Diameter) Area of circle = π/4...
- Properties Of Circle
The sample examples to find the area and circumference of a...
- Radius of a Circle
What Is the Area of a Circle? The area of a circle is the region occupied by the circle within its boundary (circumference) in a 2D plane. If the radius of a circle is r, the area is defined as A = πr 2, where is a mathematical constant with approximate value of 3.14 or $\frac{22}{7}$.
Learn how to calculate the area of a circle using the formula A = πr2 or A = (π/4) × D2. See examples, comparisons, and applications with real-world problems.
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Jul 30, 2024 · 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. It doesn't matter whether you want to find the area of a circle using diameter or radius — you'll need to use this constant in almost every case.
- What is the area of a circle with a radius [latex]4[/latex] inches? As you might have guessed, this is a very straightforward problem. The measure of the radius is given to us which is [latex]\color{red}4[/latex] inches.
- Find the area of a circle with a diameter of [latex]10[/latex] centimeters. Here’s the deal. You are assumed to give your answer in terms of [latex]\pi[/latex] unless you are explicitly told to write the area as an approximation.
- Find the exact area of a circle whose diameter has endpoints [latex]\left( { – 7,2} \right)[/latex] and [latex]\left( {5,2} \right)[/latex].
- Find the approximate area of a circle whose radius has a length of [latex]2.5[/latex] centimeters. Note: Use [latex]\large{\pi} = 3.1416[/latex].
Aug 3, 2023 · Area of the parallelogram = Area of the circle. Area of the circle = πr × r = πr 2. 2) Using Area of Triangle. The other way to derive the formula for the area of a circle is by dividing the circle with radius ‘r’ into several concentric circles and then spreading the lines, thus forming a triangle.
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.
