Q.
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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a
an isosceles triangle
b
a right angled triangle
c
an equilateral triangle
d
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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