| 摘要 |
The invention discloses a tetrahedron body (36, 38), which includes four substantially similar planar triangles (28, 30, 32, 34, 44, 46). Each triangle (28, 30, 32, 34; 44, 46) defines an isosceles triangle having a base (18, 20; 46) and two equal sides (14, 16, 22, 24, 26; 50, 52). Two pairs of the triangles share a common base (18, 20; 48) with vertexes (54, 56) formed by the equal sides (14, 16, 22, 24, 26; 50, 52) of one pair of the triangles are joined by the common base (18, 20; 46) of the other pair of triangles. Attachment means (64, 66) are associated with each planar triangle adapted for attachment to another similar tetrahedron body. |
