File:Triangle_illustration.svg · Wikimedia Commons · See Wikimedia Commons

EntityQ19821· pop 177· linked from 1,380 articles

三角形

Sign in to save

Also known as 3-gon, 2-simplex

3つの辺と頂点を持つ多角形

AI overview

A triangle is a basic geometric shape made up of three corners (called vertices) and three straight sides (called edges) that connect them. Triangles are important in geometry and mathematics because their internal angles always add up to 180 degrees, which is a fundamental property that makes them useful for understanding shapes and solving practical problems.

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

Wikidata facts

Instance of: geometric shape
Followed by: tetrahedron
Follows: line segment
Image: Triangolo-Scaleno.svg

Show 12 more facts

Unicode character: 🔻
has facet polytope: edge
Commons category: Triangles
topic's main category: Category:Triangles
has characteristic: area of a triangle
different from: isosceles triangle
has vertex figure: line segment
described by source: Encyclopædia Britannica 11th edition
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
maintained by WikiProject: WikiProject Mathematics
Wikimedia outline: list of triangle topics
topic has template: Q25744722

Sources (4)

via Wikidata · CC0

Article · 日本語

三角形（さんかくけい、さんかっけい、拉: triangulum, 独: Dreieck, 英, 仏: triangle, (古風) trigon）は、同一直線上にない3点と、それらを結ぶ3つの線分からなる多角形。その3点を三角形の頂点、3つの線分を三角形の辺という。

Abstract from DBpedia / Wikipedia · CC BY-SA

Gallery (34)

Available in 165 languages

Show 146 more

via Wikidata sitelinks · CC0