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9.7: Triangle Classification by Angles

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

TermDefinition
Acute Triangle An acute triangle has three angles that each measure less than 90 degrees.
Equilateral Triangle An equilateral triangle is a triangle in which all three sides are the same length.
Obtuse Triangle An obtuse triangle is a triangle with one angle that is greater than 90 degrees.
Right Triangle A right triangle is a triangle with one 90 degree angle.
Triangle A triangle is a polygon with three sides and three angles.

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Difficulty Level:
At Grade
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Date Created:
Oct 29, 2012
Last Modified:
Mar 17, 2017
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MAT.GEO.341.L.1