Mathematics · Geometry
A secant CD intersects a circle at points E and D, and CF is a tangent to the circle at point F. If the total length of the secant CD is 20 cm and the length of the tangent CF is 15 cm, find the length of the chord DE.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 13.75 cm
- 29.25 cm
- 311.25 cm
- 48.75 cm✓
Correct answer
8.75 cm
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