Q.

On vertex of an equilateral triangle is (2,2) and its centroid is (−23,23). The length of its side is

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a

42

b

43

c

32

d

52

answer is A.

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Detailed Solution

Given are centroid G(−23,23) and one vertex A(2,2).∴Lenght of side of of triangle =3GA=3(−23−2)2+(23−2)22(1+3)2+(1−3)2=28=42
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