原帖由 tomargom 于 2009-6-19 19:30 发表 : y/ v. O& m3 B! v: \使劲猜! / q5 [2 w2 k' E9 l* M2 @5 u' FThe : A! ^2 B. {! b" k7 Z6 z5 A' f+ DSquare and the Triangle form within the circle, but there is an inner circle and an inner square, ( [7 a7 @- B5 U' y# Z0 |0 ?
as well as an outer square and an outer circle, which prove the fourth dimension ...