AD is a tangent of a circle, and ABC is the secant. If AB = 8 cm and BC = 10 cm, then find the length of AD.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 12 cm
AB = 8 cm and BC = 10 cm
Using tangent secant segment theorem -
AD2 = AB (AB + BC)
AD2 = 8(8 + 10)
AD2 = 144
AD = 12 cm