If A = (-1,6,6), B = (-4,9,6), G=13(−5,22,22) and G is the centroid of the ΔABC , then the name of the triangle ABC is

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an isosceles triangle

a right angled triangle

an equilateral triangle

a right-angled isosceles triangle

answer is D.

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Detailed Solution

C = 3G-A-B, AB=18,BC=36,AC=18

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