Question

A three legged stool will not rock, even if the legs are of differnt lengths. Many four legged stools wobble. Explain

Answer 1

a four leg stool would not always wobble on an uneven floor. thinking the stool legs are even the four leg stool wobble because one leg will not tough the floor

Answer 2

Because it is like a plane. In order to have a plane, there must be at least 3 points. In a chair with three legs, the legs are all in the same plane.