A triangle is inscribed in a circle. The length of one of its sides is 3. Is the triangle a right triangle?

1) The triangle is isosceles.

Nothing about the other two sides or the radius of circle..

It is possible that other sides are 6 and 7...NO

Possible that aides are 4 and 5...yes

Insufficient

2) The circumference of the circle is 3π.

\(3\pi=2πr......2r=diameter=3\)..

now the largest possible side of a triangle is diameter and here the side and diameter are equal and 3So one of the sides of the triangle is the diameter and other two sides are smaller than it.

Any triangle, which has the side as the DIAMETER , is always a right angled triangle as the angle opposite to diameter is 90°

Sufficient

B

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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372

2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html

3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html

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