In the given figure XYZ is a secant and ZT is a tangent. What is the value of XY?
Answer & explanation
Correct answer: option 4
(TZ)2 = (ZY) × (ZX)
144 = 9 × ZX
⇒ ZX = 16
XY = ZX - ZY = 16 - 9 = 7 cm
In the given figure XYZ is a secant and ZT is a tangent. What is the value of XY?
Correct answer: option 4
(TZ)2 = (ZY) × (ZX)
144 = 9 × ZX
⇒ ZX = 16
XY = ZX - ZY = 16 - 9 = 7 cm