- #1
feelau
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Homework Statement
So we're suppose to show that the intervals connecting vertices of a tetrahedron with centers of gravity of opposite sides interesect at one point, namely the center of gravity of a normal tetrahedron. The center of gravity is (P+Q+R+S)/4.
Homework Equations
All I know is we have to somehow work with vectors so we at the end, we end up with result.
I really have no idea how to start. Please help :(