Theorem 10.2 : The lengths of tangents drawnrom an external point to a – InterviewSolution

1.

Theorem 10.2 : The lengths of tangents drawnrom an external point to a circle are equal.

Answer»

To provePT=QT

Proof: Consider the triangleOPT and OQT

OP=OQ

∠OPT=90°

OT=OT(common side)

Hence by RHS the triangles are equal.

HencePT=QT

Hence Proved.

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