From b0bec5152a3ed5f6c3bff05409319b8b9287bd7c Mon Sep 17 00:00:00 2001 From: Psytew Date: Mon, 10 Dec 2018 18:40:49 -0500 Subject: [PATCH] Changed article from a stub to basic information (#24480) * Update index.mb Article was a stub, added relevant information based on the Circle page and classifications of triangles * Added formatting --- guide/english/mathematics/triangle/index.md | 25 ++++++++++++++++----- 1 file changed, 20 insertions(+), 5 deletions(-) diff --git a/guide/english/mathematics/triangle/index.md b/guide/english/mathematics/triangle/index.md index dea0b0865e..5bc9ba1a40 100644 --- a/guide/english/mathematics/triangle/index.md +++ b/guide/english/mathematics/triangle/index.md @@ -3,13 +3,28 @@ title: Triangle --- ## Triangle -This is a stub. Help our community expand it. +A triangle is a polygon which has three sides and vertices, whose internal angles add up to 180 degrees. -This quick style guide will help ensure your pull request gets accepted. +Any side of a triangle can be considered a base (B). - +The distance from the base to the vertice that does not touch it is the height (H). + +### Classifications + +- A right triangle is a triangle that contains one angle equal to 90 degrees. + +- An acute triangle is a triangle that consists entirely of angles less than 90 degrees. + +- An obtuse triangle is a triangle that contains one angle more than 90 degrees. + +- An equilateral triangle's 3 sides and angles are always equal in length and degree (and therefore the angles are equal to 60 degrees). + +- An isosceles triangle has 2 sides and angles that are equal in length and degree. + +- A scalene triangle has no sides or angles that are equal in length or degree. + +![triangle](https://upload.wikimedia.org/wikipedia/commons/e/eb/Regular_polygon_3_annotated.svg "triangle") #### More Information: - - +- [Wikipedia](https://en.wikipedia.org/wiki/Triangle)