Class: IV
Sub: Maths
TOPIC:
CARTS AND WHEELS
Prepared by :Mr A.K. Pathak
We can find many such round
things around us
We can trace a circle with
the help of these things
Small circle
Big circle
Properties of Circle
Diameter
Chord
O
Radius
Centre
• Centre: 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.
Radius
• The distance from the
centre to any point on the
circle is called the radius of
the circle.
Diameter
• A line segment passing through
the centre and whose end
points are on the circle is called
the diameter of the circle.
Chord
• A line segment whose end
points are on circle is called a
chord.
• Diameter is a longest chord of
the circle.
Circumference
• The length of a circle is
called a circumference.
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 the
radius.
4. ------------ of the circle is half of its
diameter.
Thanking you