# Who is the circle?

Friends, in this post I am going to tell you about circle, in this I will tell you about the definition of circle and other information related to circle.

### Who is the circle?

**Circle,** A figure is called that which is made up of all the points in a plane which are at equal distance from a fixed point.

### circle formula

**Area of circle = r²Circumference of circle = 2πrRadius of circle (r) = d/2 where d – diameter of circleDiameter of circle (d) = 2 × r**

### definitions of circle

These are as follows-

Also Read: area of circle

#### 1.Centre

to the center point of the circle **Center **it is said. A circular line is drawn around this part of the circle in equal distance.

#### 2.Perimeter

a curved line formed by a set of points **Circumference** is called

#### 3.Radius

locus distance from the center, of the circle **Radius** is called

Also Read: what is circle

#### 4.Diameter

A straight line joining any two points on the circumference, passing through the center of the circle, is called that line. **Diameter **it is said.

#### 5.Chord

A straight line passing through any two points on the circumference, which does not pass through the center, is called that line. **Chord **it is said.

#### 6. arc

any small part of the circumference of a circle **arc** It is called

#### 7.Segment

part of a circle cut by a straight line **Segment** It is called

#### 8.Tangent Line

Any such straight line, which passes through a circle touching any point of the circle, is called **tangent line** it is said.

#### 9.Semi-Circle

only half of any circle **Semi-Circle **It is called

#### 10.Sector

The figure formed by the arc of a circle and the radii passing through its other points **Sector** is called

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**More Information:- What is triangle? type of triangle**

Read in Hindi: Who is the circle?

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