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Jul 30, 2024 · The formula to calculate the area of a circle using radius is as follows: Area of a circle = π × r 2. 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 ...
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.
The surface area of circle formula = πr 2 where 'r' is the radius of the circle and the value of π is approximately 3.14 or 22/7. Differences Between Area and Circumference of a Circle Here are some important differences between circumference (perimeter) and area of a circle.
The area of the rectangle is length × width, π𝒓 × 𝒓 = π𝒓². 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 ...
Task 1: Given the radius of a circle, find its area. For example, if the radius is 5 inches, then using the first area formula calculate π x 5 2 = 3.14159 x 25 = 78.54 sq in. Task 2: Find the area of a circle given its diameter is 12 cm. Apply the second equation to get π x (12 / 2) 2 = 3.14159 x 36 = 113.1 cm 2 (square centimeters).
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.
Oct 25, 2023 · Find the radius of the circle whose measure of surface area is 330 mm 2. Solution: As we know, A = πr 2, here A = 330 mm 2,π = 3.141 330= 3.141 × r 2 r 2 = 330/3 ...
