0 0 votes If $a, b, c$ are the sides of a triangle, and $a^2 + b^2 + c^2 = bc + ca + ab$, then the triangle is equilateral isosceles right angled obtuse angled Quantitative Aptitude cat2000 quantitative-aptitude geometry + – go_editor 14.2k points 1.3k views answer comment Share Follow Print 0 reply Please log in or register to add a comment.