![]() The length of the rope that wraps around the circle's boundary perfectly will be equal to its circumference. This means that the perimeter of a circle is equal to its circumference. If the diameter of a circle is known, its radius can be calculated as:Ĭircumference: The circumference of the circle is equal to the length of its boundary. It is represented by the letter 'd' or 'D'.ĭiameter formula: The diameter formula of a circle is twice its radius. Radius plays an important role in the formula for the area and circumference of a circle, which we will learn later.ĭiameter: A line that passes through the center and its endpoints lie on the circle is called the diameter of a circle. It is represented by the letter 'r' or 'R'. Radius: The distance from the center to a point on the boundary is called the radius of a circle. The measure of the space or region enclosed inside the circle is known as the area of the circle. We see circles in everyday life such as a wheel, pizzas, a circular ground, etc. 1.Ī circle is a collection of points that are at a fixed distance from the center of the circle. Let us learn in detail about the area of a circle, surface area, and its circumference with examples. A circle only has an area and perimeter/circumference. A circle is a two-dimensional shape, it does not have volume. Does a circle have volume? No, a circle doesn't have a volume. The area formula will also help us to know the boundary length i.e., the circumference of the circle. Suppose, if you have a circular table, then the area formula will help us to know how much cloth is needed to cover it completely. The area of a circle formula is useful for measuring the region occupied by a circular field or a plot. Pi (π) is the ratio of circumference to diameter of any circle. Area of Circle = πr 2 or πd 2/4 in square units, where (Pi) π = 22/7 or 3.14. The unit of area is the square unit, for example, m 2, cm 2, in 2, etc. The formula for the area of a circle is A = πr 2, where r is the radius of the circle. ![]() Alternatively, the space occupied within the boundary/circumference of a circle is called the area of the circle. The area of a circle is the space occupied by the circle in a two-dimensional plane.
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