Calculate the length of tangent from a point 15cm away from the centre of a circle
of radius 9cm
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Answer:
Step-by-step explanation:
We know that tangent to a circle makes a right angle with radius.
∠OPQ = 90°
Applying Pythagoras
PQ2 = OP2 + OQ2
PQ2 = 92 + 152
PQ2 = 81 + 225
PQ2 = 306
PQ = cm
Length of tangent = cm
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