Notes, Exercises, Videos, Tests and Things to Remember on Circles
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A circle is a plane figure bounded by a curved line and every point of the line is equidistance from a fixed point called the centre of the circle.
Figure a) = radii OA and OB, sector OAXB and arc AXB
Figure b) = segment CDY and Chord CD
Figure c) = semi-circle MYN and MXN, diameter MN
|\(\angle\)KLM, \(\angle\)KNM, \(\angle\)LKN, \(\angle\)LMN||KPM, LN|
|\(\angle\)ABC, \(\angle\)ADC, \(\angle\)BAD, \(\angle\)BCD||AEC, BD|
Centre and Radii of figure a) = OA and OB
Centre and Radii of figure b) = CP and DP
Centre and Radii of figure c) = EQ and FQ
Centre and Radii of figure d) = KM and KN
The straight line is drawn from the centre of a circle to a point on its circumference is called ______ .
The curved boundary line of a circle is called its ______ .
Half part of a circle is called a ________ .
The part of a curve between two given points on the curve of a circle is called ______ .
The region bounded by an arc and its corresponding chord is called ______ .