find out magnitude of following number by using si prefix 8.85pm
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the circle. Let P and Q be the point of contact and POQ be a line segment.
Construction: Join OP and OQ where O is the centre of a circle.
Proof: OQ ⊥CD and OP ⊥ AB.
Since AB CD, OP OQ.
As OP and OQ pass through O,
Hence, POQ is a straight line which passes through the centre of a circle.
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