Difference between revisions of "Triangle"
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| − | A triangle is a three-sided figure. | + | 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. | In Euclidean geometry, each side of a triangle is perfectly straight, and the sum of the internal angles of a triangle is always 180º. | ||
Revision as of 12:26, May 14, 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
