Let S=AA₁…A, be a simplex in n-dimensional Euclidean Space E with centroid G.The straight line A₁G intersects the surface A₀A₁…A-1 A+1…A,of S at the point G,and the circumsphere F of S at the point A(i=0,1,…,n).
Let the edge-lengths of S be a;₃=A₁A,(i,j=0,1,…,n,i≠j) and the medians be m=A₁G₄(i=0,1,…,n). Following theorem will be proved.
Theorem. For the simplex in E”,we have ...
The equalities in(1)and(3)hold if and only if the centroid G and
the center O of the circumsphere of S are concurrent.The equality in(2)
holds if and only if S is regular simplex,