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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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Diameter Any line segment that passes through the center of the circle and has endpoints on the circle.

Diameter Any line segment that passes through the center of the circle and has endpoints on the circle.

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