Answer :
Given:
PB = 10 cm
CQ = 2 cm
Property: If two tangents are drawn to a circle from one external point, then their tangent segments (lines joining the external point and the points of tangency on circle) are equal.
Using the above property,
PA = PB = 10 cm (tangent from P)
And,
CA = CQ= 10 cm (tangent from C)
Now,
PC = PA – CA
= 10 cm – 2 cm
= 8 cm
Hence, PC = 8 cm
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