Mathematics · Geometry
Two circles with radii r1 and r2 touch each other externally. If the length of their direct common tangent is T, which of the following is the correct relationship?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1T = r12 + r22
- 2T = 2√(r1r2)✓
- 3T = 2(r1 + r2)
- 4T = r1 + r2
Correct answer
T = 2√(r1r2)
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