For example if the radius of the circle is 6 inches first you would square 6 and get 36. π pi times the radius squared.
Area of a circle diameter.
How to find area of a circle. You can find the area of a circle using the radius the diameter or the circumference. This is a math video on how to find the area of a circle. Or when you know the circumference.
Visual on the figure below. Scroll down for a diagram. Area of a circle is the region occupied by the circle in a two dimensional plane.
Area of a circle formula. It can be determined easily using a formula a πr2 pi r squared where r is the radius of the circle. Area pi radius radius for further understanding example is given below let s say we have a circle whose radius is 3 5 cm.
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. In this video children will learn how to use the formula for finding the area of a circle. The area of a circle is.
Or when you know the diameter. π is approximately equal to 3 14. The diameter of a circle calculator uses the following equation.
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. Now follow these steps. The radius is half the diameter.
A c2 4π. Now that you know how to calculate the area of a circle we encourage you to try our other circle calculators. The unit of area is the square unit such as m2 cm2 etc.
A π 4 d2. Area of circle πr2 or πd2 4 square unit where π 22 7 or 3 14. Area of a circle π d 2 2.
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. Area of a circle formula the area of a circle is pi times the square of its radius. Learn how to use this formula to find the area of a circle when given the diameter.
The area of a circle is pi times the radius squared a π r. Area of a circle π r 2. A π r2.