Question
If a, b, c are sides of a triangle such that a2+b2+c2=ab+bc+ac. Then the triangles are:
Answer: Option A
:
A
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A
Ans: a) equilateral.
Substitute values and check. 2,2,2 for equilateral; 1,1,2 for isosceles, 3,4,5 for right angled. The equation holds only for equilateral triangles
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