A **triangle** is one of the basic shapes of geometry: a polygon with **three** corners or vertices and **three** sides or edges which are line segments. A triangle with vertices *A*, *B*, and *C* is denoted .

In Euclidean geometry any three points, when non-collinear, determine a unique triangle and a unique plane (i.e. a two-dimensional Euclidean space).

Read more about Triangle: Basic Facts, Existence of A Triangle, Points, Lines, and Circles Associated With A Triangle, Computing The Sides and Angles, Computing The Area of A Triangle, Further Formulas For General Euclidean Triangles, Morley's Trisector Theorem, Figures Inscribed in A Triangle, Partitioning Into Isosceles Triangles, Figures Circumscribed About A Triangle, Non-planar Triangles, Triangles in Construction

### Other articles related to "triangle":

**Triangle**, Virginia - Government

... Triangle is represented in the Virginia House of Delegates by L ... Scott Lingamfelter ...

**Triangle**

... The Afar

**Triangle**(also called the Afar Depression or the Danakil Depression) is a geological depression that is caused by the Afar Triple Junction which is part of the Great Rift ... The Afar

**Triangle**includes the Danakil Depression and the lowest point in Africa, Lake Asal (155 metres / 509 feet below sea level) ...

2001 The

**Triangle**has the tagline "60 years ago, the Queen of Scots vanished in the Bermuda

**Triangle**... a group of people exploring the SS Corona Queen, which has emerged from the Bermuda

**Triangle**after 30 years. 2009

**Triangle**is psychological horror film about a group of friends on a yachting trip who discover the derelict ocean liner Aeolus ...

... In a

**triangle**, four basic types of sets of concurrent lines are altitudes, angle bisectors, medians, and perpendicular bisectors A

**triangle**'s altitudes run from each vertex and meet the opposite side at a ... Angle bisectors are rays running from each vertex of the

**triangle**and bisecting the associated angle ... Medians connect each vertex of a

**triangle**to the midpoint of the opposite side ...

**Triangle**

... The Spring

**Triangle**is an astronomical asterism involving an imaginary

**triangle**drawn upon the celestial sphere, with its defining vertices at Arcturus, Spica ... This

**triangle**connects the constellations of Boötes, Virgo, and Leo ...