File:Circle-withsegments.svg · Wikimedia Commons · See Wikimedia Commons

EntityQ37221· pop 109· linked from 3,347 articles

直径

Sign in to save

[[File:Circle-withsegments.svg|thumb|right|Circle with

AI overview

A diameter is a straight line that passes through the center of a circle and connects two points on the circle's edge. It's useful because it's the longest distance across a circle and helps define the circle's size—the diameter is exactly twice the radius (the distance from the center to the edge).

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Symbol.sign: ⌀
Symbol.name: Diameter sign

via Wikipedia infobox

Wikidata facts

Image: Diameter-2-ubt.svg
Has parts of class: antipodal point

Show 4 more facts

Unicode character: ⌀
Commons gallery: Diameter
recommended unit of measurement: metre
maintained by WikiProject: WikiProject Mathematics

Sources (4)

via Wikidata · CC0

Article · 中文

直径在几何学中，是指穿过圆心且其兩端點皆在圓周上的线段，或圓上最長的弦，一般用符号d或者Ø表示。在一般的度量空间（也就是定义了距离的空间，比如说常见的二维平面）上，也可以定义一个集合的直径。在这里直径是这个集合之中两点之间的距离的最小上界：

Abstract from DBpedia / Wikipedia · CC BY-SA

Gallery (10)

Available in 108 languages

Show 89 more

via Wikidata sitelinks · CC0