Question
From an external point P, a tangent PT is drawn to a
circle with centre O. If OP = 17 cm and radius = 8 cm, then PT is:Solution
ATQ, In right triangle OPT, OP^2 = OT^2 + PT^2 17^2 = 8^2 + PT^2 289 = 64 + PT^2 PT^2 = 225 PT = 15 cm
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