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प्रश्न
In the figure given below, PT is a tangent to the circle. Find PT if AT = 16 cm and AB = 12 cm.
बेरीज
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उत्तर
PT is tangent.
Hence by theorem,
PT2 = AT x BT
PT2 = 16 x (AT - AB)
PT2 = 16 x (16 - 12)
PT2 = 16 x 4 = 64
PT = 8 cm.
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