6 CentreCentre: Each point of a circle is at equal distance from a fixed point.The fixed point is called the centre of the circle.Centre is in the interior part of the circle but centre is not a part of a circle.
7 RadiusThe distance from the centre to any point on the circle is called the radius of the circle.
8 DiameterA line segment passing through the centre and whose end points are on the circle is called the diameter of the circle.
9 Chord A line segment whose end points are on circle is called a chord. Diameter is a longest chord of the circle.
10 CircumferenceThe length of a circle is called a circumference.
11 Assessment Fill in the blanks 1. -------- is not a part of a circle. 2. Centre lies in the part of a circle.3. Diameter of a circle is of theradius.of the circle is half of itsdiameter.