Engineering Board Exam Reviewer · Circles: Chords, Tangents and Secants · easy
A point is 13 units from the center of a circle of radius 5. Find the length of the tangent from the point to the circle.
- 12
- 8
- 13
- 18
Answer
A. 12
Solution
The radius to the point of tangency is perpendicular to the tangent: t=sqrt(132-52)=12.
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