If a - b - c are sides of a triangle such that a 2- b 2- c 2- ab - bc - ac- Then the triangles are-A- equilateralB- isoscelesC- right angledD- obtuse angled

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Triangles

If a , b , c ...

Question

If a, b, c are sides of a triangle such that a²+b²+c²=ab+bc+ac. Then the triangles are:

equilateral

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isosceles

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right angled

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obtuse angled

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