Hosted by The Math Forum


Problem of the Week 909

Planes in Space

Given 4 points in 3-space, not all on the same plane, how many planes P are there such that the distance from P to each of the four points is the same?

Source: (Korean Olympiad) Crux. Math. Feb. 2000
© Copyright 2000 Stan Wagon. Reproduced with permission.


28 March 2000