CIRCLE

The collection of all the points in a plane, which are at a fixed distance from a fixed point in the plane, is called a CIRCLE

Circle divides the plane into three parts:

(i) The  CIRCLE

(ii)Inside the circle known as its INTERIOR

(iii)Outside the circle known as its EXTERIOR

CHORD

Line segment whose end points lie on the circle is known as a CHORD

Chord which passes through the centre is called a DIAMETER

ARC

Piece of circle between two points is known as an ARC

Longer one is known as MAJOR ARC

Smaller one is known as MINOR ARC

SEGMENT

Region between the chord and either of the arcs is known as SEGMENT of the circle.

There are two types of segments:

MINOR SEGMENT

MAJOR SEGMENT

SECTOR

Region between the arc and the two radii is known as SECTOR of the circle.

There are two types of sectors:

MINOR SECTOR

MAJOR SECTOR