Question

If PA and PB are tangents from an outside point P . such that PA = 10cm and angle APB = 60° . Find the length of chord AB.​

Answer 1

PA = PB (tangents from an external point are equal)

=> ∆PAB is isosceles.

=> Angle PAB = Angle PBA = 60° [all angles are 60° since two angles are 60° so remaining angle = 180°-(60°+60°) = 60°]

=> ∆ PAB is equilateral.

Hence, AB is 10 cm

Answer 2

Answer:

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