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Circles - Coggle Diagram
Circles
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Defination
The collection of all the points in a plane, which are at a fixed distance from a fixed point in the plane, is called a circle.
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Equal chords of a circle (or of congruent circles) are equidistant from the centre (or centres) and opposite.
The angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle.
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If a line segment joining two points subtends equal angles attwo other points lying on the same side of the line containing the line segment,the four points lie on a circle (i.e. they are concyclic) and opposite.
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