Polyhedra with seven vertices are rare . 具有七個(gè)頂點(diǎn)的多面體是稀少的。
This leads us to another contribution of leonhard euler to graph theory, namely euler's polyhedron theorem or simply euler's formula . 這是我們引向L尤拉對(duì)圖論的另一個(gè)貢獻(xiàn),即尤拉多面體定理,或簡(jiǎn)稱尤拉公式。
Regular polyhedra can be divided into 3 groups 正多面體有一個(gè)特色,可以分成三組。
This property is called the duality of regular polyhedra 這稱為正多面體的二重性。
The edges of a regular polyhedron are always equal 所有正多面體的邊均只有一種長(zhǎng)度。