in a triangle ABC where a,b,c are the sides opposite to the angles A,B,C respectively

if $\displaystyle a^2 + b^2 + c^2 = ac + ab*3^\:\dfrac{1}{2}$

prove that it is a right triangle

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- Aug 11th 2010, 06:53 AMgrgrsanjayin a triangle ABC
in a triangle ABC where a,b,c are the sides opposite to the angles A,B,C respectively

if $\displaystyle a^2 + b^2 + c^2 = ac + ab*3^\:\dfrac{1}{2}$

prove that it is a right triangle - Aug 11th 2010, 11:50 AMAmer
what is the question ??

- Aug 12th 2010, 07:32 AMgrgrsanjay..
prove that it is a right angled triangle