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The centroid of a tetrahedron with vertices a, b, c, d has position vector?
A(a + b + c)/4
B(a + b + c + d)/2
C(a + b + c + d)/3
D(a + b + c + d)/4
Answer & Solution
Correct answer: D. (a + b + c + d)/4
With four vertices the centroid is their average, the sum divided by 4.
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