Maths
posted by Mithun raj .
Equilateral triangle ABC is inscribed in circle O, whose radius is 4. Altitude BD is extended until it intersects the circle at E. What is the length of DE?
a) √3
b) 2√3
c) 2
d) 4√3

Maths 
Steve
The altitude of an equilateral triangle is also a median.
The medians intersect 2/3 of the way from the vertex to the opposite side.
So, BO=4, and BD=6
BE is the diameter of the circle, so BE=8
so, what do you think?
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