A tangent PQ at a point P of a circle of diameter 12cm meets a line through centre O at a
Point Q such that PQ = 8cm, then find length of OQ.
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Answer:
radius(op)=diameter/2
=12/2
=6cm
using pythagoras theorem
op^2+pq^2=oq^2
6^2+8^2=oq^2
36+64=oq^2
100=oq^2
10cm=oq
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