Triangle: Difference between revisions
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imported>Robert W King (New page: ''This article is about the geometric shape. For the drafting tool, see Triangle (tool).'' A '''triangle''' is a geometric shape constructed with three angles, that when summed are e...) |
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''This article is about the geometric shape. For the drafting tool, see [[Triangle (tool)]].'' | ''This article is about the geometric shape. For the drafting tool, see [[Triangle (tool)]].'' | ||
Revision as of 21:03, 9 October 2007
This article is about the geometric shape. For the drafting tool, see Triangle (tool).
A triangle is a geometric shape constructed with three angles, that when summed are equal to 180 degrees, and three lines.
Several different types of triangles exist:
- An equilaterial triangle is one such that each angle is the same (60 degrees), and each side is of the same length.
- An isosceles triangle is one that has two sides of equal length, and two angles of the same degree. Example: a triangle with two 75 degree angles and one 30 degree angle.
- An obtuse triangle is one that has one angle which is greater than 90 degrees.
- An acute triangle is one such that all three angles are less than 90 degrees.
- A right triangle is one that has one 90 degree angle.