# Circle Math

In circle math the terms related to the circle are discussed here.

A circle is such a closed curve whose every point is equidistant from a fixed point called its center.

The symbol of circle is O.

What are the terms related to the circle?

The terms related to the circle math are:

(i) Center:

The center of a circle is a fixed point within the circle from which all the points of the closing curve are equidistant.

O is the centre.

(ii) Circumference:

The curve which closes a circle is called its circumference. The length of the circumference is called the length of the circle.

The distance from the centre to any point on the circumference of a circle is called the radius of the circle. The symbol of the radius is r.

(iv) Diameter:

The line-segment passing through the centre and meeting the points on the circumference is called the diameter of the circle. Diameter is denoted by 'D'.

AB is a diameter of the circle.

Diameter is twice the length of the radius concerned.

Thus, D = 2r [Diameter = 2radius]

or

r = D/2 [Radius = Diameter/2]

(v) Arc:

Any part of the circumference is called an arc of the circle.

(vi) Chord:

The line-segment joining the two ends of an arc is known as a chord. A diameter is the longest chord of a circle.

Here,

O is the centre.

AB is a diameter.

MN is a chord . (line-segment)

OA and OB are also radii.



Related Concepts on Geometry - Simple Shapes & Circle

Simple Closed Curves

Polygon

Different Types of Polygons

Angle

Triangle

Circle Math

Line Symmetry

Symmetrical Shapes

Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.