# Math Help - in a right angled triangle ABC

1. ## in a triangle ABC

in a triangle ABC where a,b,c are the sides opposite to the angles A,B,C respectively
if $a^2 + b^2 + c^2 = ac + ab*3^\:\dfrac{1}{2}$
prove that it is a right triangle

2. what is the question ??

3. ## ..

prove that it is a right angled triangle