Radius of the circle- If we construct a line which join centre of the circle to the any point of boundary (circumference) of the circle. Generally we denote radius by r .
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| OA,OB. OC OD are radius of circle |
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Concentric circle- (संकेंद्रित वृत्त) If two and more then two circle have same centre but different radii, they are called concentric c...
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sector - sector is an area surrounded by two radii and an arc, as shown is figure. OA and OB is radius and AxB is arc Area of sector = P... -
Secant of a circle - A line which meet a circle into two points is called a secant of the circle, in given figure XY is a secant.
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