Latest SSC Aptitude Question SOLUTION: What is the length of the radius of the circumcircle of the equilateral triangle, the length of whose side is 6 sqrt(3) cm ?

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What is the length of the radius of the circumcircle of the equilateral triangle, the length of whose side is 6 sqrt(3) cm ?

Asked In SSC Rats (11 years ago)

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Narendra Kumar Gupta  (7 years ago)

I one sees in the fig. a circle is outside a equ. triangle

taking one vertex SAY angle A = 60;
Angle at center of the circle with two left out vertex will be 90-60/2 = 120
Now as the lines of radius of circle has bisected the triangle angle OBC = angle OCB = 30
side = 6 root 3
cos 30 = 6 root 3 / H (H == radius of circle)
H = 6

Ans : 6 cm

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