# Triangle/Related Articles

< Triangle

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*See also changes related to Triangle, or pages that link to Triangle or to this page or whose text contains "Triangle".*

## Parent topics

## Subtopics

- Equilateral triangle [r]: A triangle with three equal sides and three equal angles.
^{[e]} - Isosceles triangle [r]: A triangle that has two sides of equal length and two angles of the same degree.
^{[e]} - Obtuse triangle [r]: A triangle that has one angle which is greater than 90 degrees.
^{[e]} - Acute triangle [r]: A triangle that has all three angles less than 90 degrees.
^{[e]} - Right triangle [r]: A triangle that has one 90 degree angle.
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