Q. 25.0( 3 Votes )
Find the length of the tangent from a point which is at a distance of 5 cm from the centre of the circle of radius 3 cm.
Given: PQ is a tangent to the circle intersect at Q. OP = 5 cm and OQ = 3 cm.
To find: PQ
In rt.Δ OQP, by Pythagoras theorem
PQ = ==== 4 cm
Therefore the length of the tangent from a point is 4 cm.
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