Math Doubts

Diameter

Definition

The straight distance between any two opposite points on the circumference through centre of the circle is called the diameter of the circle.

diameter of a circle

Diameter is a distance between two points on the circumference but one point should be opposite to another point through the centre of the circle.

The diameter of a circle is twice the radius of the same circle geometrically and it is usually denoted by the letter $d$.

$Diameter \, (d) = 2 \times radius$

This formula is used to find the diameter of a circle from the radius of the circle in mathematics.

Example

example of diameter of a circle

$E$ and $F$ are two opposite points on the circumference of the circle in the point of view of its centre ($C$).

The straight distance from point $E$ to point $F$ through centre $C$ is known as the diameter of the circle. The straight path between points $E$ and $F$ seems the length of a line segment $\overline{EF}$.

Diameter ($d$) $= EF$

In this case, the distance between points $C$ and $E$, also distance between points $C$ and $F$ is radius of the circle.

$d = 2 \times CF$ (or) $d = 2 \times CE$



Follow us
Email subscription
Math Doubts
Math Doubts is a best place to learn mathematics and from basics to advanced scientific level for students, teachers and researchers. Know more
Follow us on Social Media
Mobile App for Android users Math Doubts Android App
Math Problems

Learn how to solve easy to difficult mathematics problems of all topics in various methods with step by step process and also maths questions for practising.

Learn more