given two concentric circles with centre o if a line cuts the circle at ABCD and if ab is 10 centimetre find the length of CD
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Step-by-step explanation:
⇒ In figure, O is center of two concentric circles.
⇒ Let OM be the perpendicular bisector of AD and BC.
∴ AM=MD and -------- ( 1 )
∴ BM=MC ------ ( 2 )
⇒ AM−BM=MD−MC [ Subtracting ( 2 ) from ( 1 ) ]
∴ AB=CD
∴ CD=10cm [∵AB=10cm]
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