Parts of Circle
Circle is a closed curve in which all the points are equidistant from one fixed point i.e. centre. Examples of circles as seen in everyday life are clocks, wheels, pizzas, etc.
Various terms related to the circle are discussed below:
1. Radius: The distance of a point from the boundary of the circle to its centre is termed its radius. Radius is represented by the letter ‘r‘ or ‘R‘. The area and circumference of a circle are directly dependent on its area.
2. Diameter: Longest chord of a circle that passes through its centre is termed its diameter. It is always twice its radius.
Diameter formula: The formula for the diameter of a circle is Diameter = 2 × Radius
d = 2×r or D = 2×R
also, conversely, the radius can be calculated as:
r = d/2 or R = D/2
3. Circumference: The circumference of the circle is the total length of its boundary i.e. perimeter of a circle is termed its circumference. The Circumference of a circle is given by the formula C = 2πr.
Area of a Circle: Formula, Derivation, Examples
Area of a Circle is the measure of the two-dimensional space enclosed by a circle. It is mostly calculated by the size of the circle’s radius.
Let’s learn how to find the area of the circle using the formulas, with the help of examples.
Table of Content
- Area of Circle
- Area of Circle with Radius
- Area of Circle in terms of Diameter
- Area of a Circle using Circumference
- Area of Circle Examples