How many ways can four points be arranged in a plane so that the six distances between pairs of points take on only two different values?

Well, we know of the square and the equilateral triangle with a central point ... this could become interesting.

Should we consider the imaginary plane as a separate plane? What about non-Euclidian planes?

Edited on November 21, 2004, 7:09 pm

Posted by CeeAnne on 2004-11-21 19:01:22