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CBSE Class 10 Answered

PT is a tangent & PAB is a secant of the circle meeting the circle at A & B. If PA=4cm & AB=5cm. What is the length of PT?
Asked by araima2001 | 06 Nov, 2015, 11:02: AM
answered-by-expert Expert Answer
PT is a tangent to the circle at T.
PAB is a secant such that PA = 4 cm, AB = 5 cm
So, PB = PA + AB = 4 cm + 5 cm = 9 cm
Using Tangent-secant property,
PT2 = PA . PB
PT2 = 4 X 9 = 36
PT = 6 cm
Answered by satyajit samal | 08 Nov, 2015, 08:15: AM

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