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来自维基百科,自由的百科全书
在几何学中,七阶七边形镶嵌是由七边形组成的双曲面正镶嵌图,在施莱夫利符号中用{7,7}表示。七阶七边形镶嵌每个顶点皆由七个七边形共用,且七边形不重叠,这样一来,该点处的内角和将超过360度,因此无法存于平面上,但可以在双曲面上作出。
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.