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
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