Triangles (Jump to: Lecture | Video )
Triangle |
A triangle is a shape made up of three line segments which intersect at their endpoints.
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The three angles of any triangle add up to 180 degrees.
Triangles can be classified as Right Triangles, Acute Triangles, or Obtuse Triangles.
Right Triangle |
A Right Triangle is a triangle with one right angle.
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Acute Triangle |
An Acute Triangle is a triangle with all acute angles.
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Obtuse Triangle |
An Obtuse Triangle is a triangle with one obtuse angle.
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Triangles can also be classified by the length of their sides. There are Equilateral Triangles, Isoceles Triangles, and Scelene Triangles.
Equilateral Triangle |
An Equilateral Triangle is a triangle with all thee sides equal.
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Isoceles Triangle |
An Isoceles Triangle is a triangle with two equal sides.
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Scalene Triangle |
A Scalene Triangle is a triangle with no equal sides.
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