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For an equilateral triangle, what is R : r, the circumradius to inradius ratio?
A3 : 1
B1 : 1
C√3 : 1
D2 : 1
Answer & Solution
Correct answer: D. 2 : 1
For an equilateral triangle the centers coincide and R = 2r, so d² = R(R − 2r) = 0.
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