What is a Circle?
A circle is two dimensional round shaped figure bounded by curved line. There are no edges or corner in a circle. The length of the curved line making the boundary of the circle is the circumference of the circle. The image showing the circle with all its components is attached below:
Components of Circle
There are the following components of a circle that define the nature of a circle.
Centre: Centre is the point inside a circle that is equidistant from the circumference of the circle.
Radius: The radius is the distance from the center of the circle to the circumference of the circle. A circle can have an infinite number of radii.
Diameter: Diameter is the length from one point on the circumference to another point passing through the center. The diameter is twice the length of the radius of the circle. A circle can have an infinite number of diameters.
Chord: The chord is the distance between any two points on the circumference of the circle. The diameter is the longest chord of the circle.
General Properties of Circle
Some general properties of circles are mentioned below:
- Circles with a common center are called Concentric Circles.
- Circles with the same radii measurement are congruent.
- The radius and tangent are perpendicular at the point of contact.
- A line segment from the radius and perpendicular to the chord bisects the chord.
Circumference Formula
Circumference Formula as the name suggests is the formula for calculating the circumference of a circle and as we know the circumference of a circle is defined as the length of the boundary of the circle. For ease of understanding, Circumference is the perimeter of the circle.
Circumference Formula is given by the product of twice the radius and the constant value π. A circle is a two-dimensional curved figure and a bangle is one of the best examples of the Circle. In this article, we will learn about the Circumference Formula and also learn how to calculate the Circumference of a Circle using Circumference Formula. We will also learn the Circumference Formula for semicircles, spheres, and other 3D objects whose at least one face is circular in nature.
Table of Content
- What is the Circumference Formula?
- Circle Circumference Formula
- Semi Circle Circumference Formula
- Circumference Formula for Some Other Curved Objects
- Sample Problems on Circumference Formula