Star polygon - Wikipedia
A regular star polygon is a self-intersecting, equilateral, and equiangular polygon. A regular star polygon is denoted by its Schläfli symbol {p/q}, where p (the number of vertices) and q (the density) are relatively prime (they share no factors) and where q ≥ 2.
Star Types - Science@NASA
A normal star forms from a clump of dust and gas in a stellar nursery. Over hundreds of thousands of years, the clump gains mass, starts to spin, and heats up. When the clump's core heats up to millions of degrees, nuclear fusion starts.
正星形多角形 - 百度百科
正星形多角形(regular star polygon)亦称等边半正凹多角形或等边半正凹多边形，是一种特殊的凹多角形，指顶点个数为偶数，所有边都相等，且相间的角相等的凹多角形，正星形多角形的2n个角中，有n个相等的优角，另外n个角必是相等的锐角，整个图形成为星形 ...
正星体 - 百度百科
正星体(regular star body)是一种特殊的正多面体，以正n面体各面为底，向外作正棱锥，使这些棱锥的侧面皆为相等的正三角形，这样得到的若是凹多面体，则称它为正(n角)星体。
星形正多面體 - 维基百科，自由的百科全书
星形正多面體 （克卜勒-龐索特多面體）是一類 非凸多面體，共有四個。 它們的表面均為 正多邊形 或 星形正多邊形，且每個 頂點 都有相同數目的 邊 連接。 皮特里多邊形是指兩個連續邊都屬於 多面體 的一個面，但三邊不屬多面體的面的 不共面多邊形。 哈罗德·斯科特·麦克唐纳·考克斯特 證明了若 正多面體 的皮特里多邊形有 邊，則有. 除了 均為正整數時，有5組解，對應5個正多面體。 當 為正有理數時，有多4組解，分別對應4個克卜勒-龐索特多面體。 14世紀Paolo Uccello的畫作 …
Star Shape Calculator
3 天之前 · Twinkle, twinkle, little star... our star shape calculator will calculate all of the important elements of a star polygon in the blink of an eye! Here you will learn everything about star-shaped polygons.
What is a Star Shape? | Definition & Types of Star | Twinkl
Regular star shapes are created when you connect the vertex of a simple polygon (with any number of sides) to another, non-adjacent vertex. Connect these up again and again until the shape reaches the original vertex, and at that point, you’ll have a recognizable star shape.
Definition:Regular Star Polygon - ProofWiki
A regular star polygon is a plane figure formed by constructing a line segment joining every $m$th point of those $n$ equally spaced points. Such a regular star polygon can be denoted $\set {n / m}$.
Star polygon | Math Wiki | Fandom
In geometry, a regular star polygon is a self-intersecting, equilateral equiangular polygon, created by connecting one vertex of a simple, regular, n-sided polygon to another, non-adjacent vertex and continuing the process until the original vertex is reached again.
Kepler–Poinsot polyhedron - Wikipedia
In geometry, a Kepler–Poinsot polyhedron is any of four regular star polyhedra. [1] They may be obtained by stellating the regular convex dodecahedron and icosahedron, and differ from these in having regular pentagrammic faces or vertex figures. They can all be seen as three-dimensional analogues of the pentagram in one way or another.
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