A regular tetrahedron is a pyramid with four faces, each of which is an equilateral triangle.
Let ABCD be a regular tetrahedron and let P be the unique point equidistant from points A,B,C,D. Extend line AP to hit face BCD at point Q. What is the ratio PQ/AQ?
There is no diagram for this problem.
The asnwer is not 2/5.
