AB is a chord of the circle and its center is â€œOâ€. ON is p – McqOptions

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1.	AB is a chord of the circle and its center is â€œOâ€. ON is perpendicular to AB. If the length of AB=20 cm, ON-(2âˆš11) cm, find the radius (in cm) of the circle.
A.	10
B.	12
C.	13
D.	15
Answer» C. 13

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