File:Circle-withsegments.svg · Wikimedia Commons · See Wikimedia Commons
Also known as circle radius, radius of a circle
一般的に、円や球の直径の半分およびその長さ
AI overview
A radius is a straight line drawn from the center of a circle to any point on its edge. It's an important measurement because it determines the size of the circle and is used to calculate other properties like the circle's area and distance around its edge.
AI-generated from the Wikipedia summary — may contain errors.
Wikidata facts
Show 3 more facts
- described by source
- Encyclopædia Britannica 11th edition
- Commons gallery
- Radius
- recommended unit of measurement
- metre
via Wikidata · CC0
Article · 日本語
古典的な幾何学では円や球の半径 (英: radius) は、その中心から周囲へ渡した任意の線分や、その長さである。 これは「光線」や「輻」を意味するラテン語: radius に由来し、一点からあらゆる方向へ放射状に延びる線分（あるいは半直線 (ray)）を表している。
Abstract from DBpedia / Wikipedia · CC BY-SA
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