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  • Circle: Circle is a simple closed curve.



    1. The fixed point O is the centre of the circle.
    1. The fixed distance OP = OQ is the radius of the circle.
    1. The distance around the circle is its circumference.
    1. A line joining any two points on a circle is known as chord. In the given figure, RS and PQ are the chords.
    1. The chord passing through the centre of a circle is called diameter. The diameter of a circle divides it into two semicircles.
    1. The diameter of a circle is the longest chord of the circle …

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