File:Herzkurve2.svg · Wikimedia Commons · See Wikimedia Commons
Also known as circumference, perimeter length, length of perimeter
ある領域の周囲の長さ
Perimeter is the distance around the outside edge of a flat, two-dimensional shape, measured by adding up the lengths of all its sides. It matters because it helps us figure out how much material we'd need to go around something (like fencing for a yard) or understand the size of a shape's boundary.
AI-generated from the Wikipedia summary — may contain errors.
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- New International Encyclopedia
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Article · 日本語
周長（しゅうちょう）は単純閉曲線の始点から終点までの長さ。周囲（ペリメーター、英: perimeter) の長さのこと。英語の perimeter は周囲と周長の両方を指す。 多角形の周長は四則演算だけで計算できるが、円の周長は円周率が無理数であるため式は簡素でも小数点表記では厳密な値を表現することはできず、楕円の周長は四則演算だけでは表すことができない。
Abstract from DBpedia / Wikipedia · CC BY-SA
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