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**Class: IV Sub: Maths TOPIC: CARTS AND WHEELS**

Prepared by :Mr A.K. Pathak

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**We can find many such round things around us**

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**We can trace a circle with the help of these things**

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Small circle Big circle

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Properties of Circle O Diameter Chord Radius

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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.

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

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Diameter A line segment passing through the centre and whose end points are on the circle is called the diameter of the circle.

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**Chord A line segment whose end points are on circle is called a chord.**

Diameter is a longest chord of the circle.

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Circumference The length of a circle is called a circumference.

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**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.

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Thanking you

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