定規とコンパスによる作図
1. Compass and straightedge constructionsCompass-and-straightedge or ruler-and-compass construction is the construction of lengths, angles, and other geometric figures using only an idealized ruler and compass. The idealized ruler, known as a straightedge, is assumed to be infinite in length, and has no markings on it and only one edge. The compass is assumed to collapse when lifted from the page, so may not be directly used to transfer distances.
Read “Compass and straightedge constructions” on English Wikipedia
Read “定規とコンパスによる作図” on Japanese Wikipedia
Read “Compass and straightedge constructions” on DBpedia
Read “Compass and straightedge constructions” on English Wikipedia
Read “定規とコンパスによる作図” on Japanese Wikipedia
Read “Compass and straightedge constructions” on DBpedia
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