Triangle - Revision history

Aschlafly: In political ideology, a triangle symbolizes change as the Greek delta symbol. Usually demands for change are to move towards socialism and away from the U.S. Constitution and principles of a constitutional republic.

2021-08-01T18:18:52Z

In political ideology, a triangle symbolizes change as the Greek delta symbol. Usually demands for change are to move towards socialism and away from the U.S. Constitution and principles of a constitutional republic.

2011-08-31T01:08:45Z

Reverted edits by Cukuplz (talk) to last revision by BRichtigen

2011-08-31T01:06:19Z

2008-12-08T19:25:49Z

sp - thanks, markr

2008-12-08T19:19:54Z

move down "any three points"

2008-12-08T19:08:11Z

Types of triangles: obtuse

2008-12-08T19:05:51Z

Examples, examples...

2008-12-08T18:38:49Z

Naming conventions: alternative...

2008-12-08T12:53:12Z

Adding pic

2008-12-08T12:52:32Z

Naming convention

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 In [[Euclidean geometry]], each side of a triangle is perfectly straight, and the sum of the internal angles of a triangle is always 180º.
 A triangle is defined by any three points that are not [[collinear]].
 ==Naming conventions==

← Older revision		Revision as of 01:08, August 31, 2011
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−	~~{{User talk:Rsmitchell}}~~
	[[Image:Triangle.png\|right]]		[[Image:Triangle.png\|right]]
	A '''triangle''' is a three-sided [[geometric]] [[shape]].		A '''triangle''' is a three-sided [[geometric]] [[shape]].

← Older revision		Revision as of 01:06, August 31, 2011
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		+	{{User talk:Rsmitchell}}
	[[Image:Triangle.png\|right]]		[[Image:Triangle.png\|right]]
	A '''triangle''' is a three-sided [[geometric]] [[shape]].		A '''triangle''' is a three-sided [[geometric]] [[shape]].

@@ Line 5: / Line 5: @@
 ==Naming conventions==
-Usually, the vertices of a triangle are counter-clockwise denoted by big Latin letters, while small Latin letters are used for the sites: Every site will have the same letter as the opposite vertex.
+Usually, the vertices of a triangle are counter-clockwise denoted by big Latin letters, while small Latin letters are used for the sides: Each side will have the same letter as the opposite vertex.
 The angles are denoted by Greek letters, if possible, the letter of an angle will correspond to the letter of the adjacent vertex.
 Often, the sides will be referenced by the adjacent vertices: in the triangle on top of this page, we have <math>a = \overline{BC} = \overline{CB}, b = \overline{CA} = \overline{CA}, c = \overline{BA} = \overline{AB} </math>.

@@ Line 1: / Line 1: @@
 [[Image:Triangle.png|right]]
-A '''triangle''' is a three-sided [[geometric]] [[shape]], made by any three points that are not [[collinear]].
+A '''triangle''' is a three-sided [[geometric]] [[shape]].
 In [[Euclidean geometry]], each side of a triangle is perfectly straight, and the sum of the internal angles of a triangle is always 180º.
 ==Naming conventions==

@@ Line 27: / Line 27: @@
   |<!--col2-->[[Image:Isoscles-triangle.png|150px]]
   |<!--col3-->[[Image:Equilateral-triangle.png|150px]]
-  |<!--col4-->[[Image:Obtuse-triangle.jpg|150px]]
+  |<!--col4-->[[Image:Obtuse-triangle.png|150px]]
   |-
   |<!--col1-->Right Triangle
@@ Line 39: / Line 39: @@
   |<!--col4--><math>\angle ACB > 90^\circ</math>
   |}<!--end wikitable-->
 ==Congruence of triangles==

← Older revision		Revision as of 12:53, December 8, 2008
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		+	[[Image:Triangle.png\|right]]
	A '''triangle''' is a three-sided [[geometric]] [[shape]], made by any three points that are not [[collinear]].		A '''triangle''' is a three-sided [[geometric]] [[shape]], made by any three points that are not [[collinear]].

← Older revision		Revision as of 12:52, December 8, 2008
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	An '''obtuse triangle''' has one angle that measures more than 90<sup>o</sup>.		An '''obtuse triangle''' has one angle that measures more than 90<sup>o</sup>.
		+
		+	==Naming conventions==
		+	Usually, the vertices of a triangle are counter-clockwise denoted by big Latin letters, while small Latin letters are used for the sites: Every site will have the same letter as the opposite vertex.
		+	The angles are denoted by Greek letters, if possible, the letter of an angle will correspond to the letter of the adjacent vertex.

	==Congruence of triangles==		==Congruence of triangles==