in the given figure find out the length of CD . if the radius of a is 5 cm and ab is 8 cm
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r = 5 cm, AB = 6 cm
∴AP=3cm,CD=8cm
∴CQ=4cm
In ΔAOP,
OP
2
=(OA)
2
−(AP)
2
= 25 - 9 = 16
⇒OP=4cm
In ΔOCQ,
(OQ)
2
=25−16=9cm
2
⇒ OQ = 3cm
PQ = OP - OQ
= 4−3 = 1 cm
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