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Question: How to find one option in which a sphere is tangent with every edge of a tetrahedron?

Question:How to find one option in which a sphere is tangent with every edge of a tetrahedron?

minhthien2016 355 Maple 2018
January 29 2021
1

I am trying to find one option so that  a sphere is tangent with every edge of a tetrahedron. Suppose tetrahedron OABC, here O(0,0,0), A(x1, y1, z1), B(x2, y2, z2), and C(x3, y3, z3).  How to find a sphere is tangent with every edge of a tetrahedron?
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