Engineering Board Exam Reviewer · Circles: Chords, Tangents and Secants · hard
Two circles with radii 5 and 12 have centers 13 units apart. Find the length of their common chord.
- 4.62
- 9.23
- 12
- 10
Answer
B. 9.23
Solution
Since 52+122=132, the circles meet at right angles and the common chord is 2(5)(12)/13=120/13 9.23.
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