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9.9: Angle Measures in Given Triangles

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.
Interior angles Interior angles are the angles inside a figure.
Isosceles Triangle An isosceles triangle is a triangle in which exactly two sides are the same length.
Obtuse Triangle An obtuse triangle is a triangle with one angle that is greater than 90 degrees.
Protractor A protractor is a tool used to measure an angle in terms of degrees.
Right Triangle A right triangle is a triangle with one 90 degree angle.
Scalene Triangle A scalene triangle is a triangle in which all three sides are different lengths.

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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.311.L.1