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We will discuss the Area and Perimeter of a Circle. The area (A) of a circle (or circular region) is given by A = πr^2 where r is the radius and, by definition, π = Circumference/Diameter = 22/7 (Approximately).
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 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.
Learn how to calculate the area of a circle using the formula A = πr2, where r is the radius and π is pi. See the derivation of the formula using rectangles and triangles, and examples of real-life applications of the area of a circle.
2 Οκτ 2024 · The circle perimeter formula is: p = 2πr, where p is the circle's perimeter, r is the radius, and π is a constant equal to approximately 3.14159265... You can also express the perimeter in terms of the diameter (d), remembering that r = d/2: p = πd.
The circumference is the perimeter of a circle. It is a length and so is measured in \ (mm\), \ (cm\), \ (m\) or \ (km\). An area is measured in square units: \ (mm^ {2}\), \ (cm^ {2}\), \ (m^...
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)
