円板
Also known as disc, filled circle, circular area
plane figure, bounded by circle
AI overview
A disk is a flat, round shape that includes everything inside a circle, including the circle's edge itself. It matters in mathematics and everyday life because many objects—from plates to wheels to coins—are disk-shaped, making it a fundamental form for understanding geometry and designing practical things.
AI-generated from the Wikipedia summary — may contain errors.
Article · 日本語
各種幾何学における円板（えんばん、英: disk; disc と綴ることもある）は、平面上で円で囲まれた有界領域である。 円板はその境界となる円周を「すべて含む」または「全く含まない」ことを以ってそれぞれ「閉円板」または「開円板」という。
Abstract from DBpedia / Wikipedia · CC BY-SA