Difference between revisions of "Triangle"

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(euclidean)
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A triangle is a three-sided figure. In geometry, each side of a triangle is perfectly straight.  
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A triangle is a three-sided figure.  
  
The sum of the internal angles of a triangle is always 180º.
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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 [[right triangle]] has one 90º angle. Right triangles have special properties (see [[trigonometry]]).  
 
A [[right triangle]] has one 90º angle. Right triangles have special properties (see [[trigonometry]]).  

Revision as of 01:12, 23 April 2007

A triangle is a three-sided figure.

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 right triangle has one 90º angle. Right triangles have special properties (see trigonometry).

See: polygon