Engineering Board Exam Reviewer · Circles: Chords, Tangents and Secants · medium
From an external point P, a tangent PT and a secant PAB are drawn to a circle (A nearer to P). If PT=12 and PA=8, find PB.
- 18
- 16
- 20
- 14.4
Answer
A. 18
Solution
By the tangent-secant theorem: PT2=PA· PB 144=8· PB PB=18.
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