1. Class: IV Sub: Maths TOPIC: CARTS AND WHEELS
Prepared by :Mr A.K. Pathak

2. We can find many such round things around us

3. We can trace a circle with the help of these things

4. Small circle
Big circle

5. Properties of Circle O
Diameter
Chord
Radius

6. 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.

7. Radius
The distance from the centre to any point on the circle is called the radius of the circle.

8. Diameter
A 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. Circumference
The 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 the
radius.
of the circle is half of its
diameter.

12. Thanking you