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Questions  

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

a
42
b
43
c
32
d
52

detailed solution

Correct option is A

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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