In an equilateral triangle with side length 'a', what is the ratio of the circumradius to the inradius?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 2:1.
For an equilateral triangle with side length a:
Circumradius (R) = a/√3
Inradius (r) = a/(2√3)
R : r = (a/√3) : a/(2√3) = 1 : 1/2 = 2 : 1