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en.wikipedia.org/wiki/Acute_and_obtuse_triangles

An acute triangle is a triangle with all three angles acute (less than 90°). An
obtuse triangle is one with one

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An

www.khanacademy.org/math/basic-geo/basic-geo-angle/basic-geo-angle-types/v/drawing-acute-right-and-obtuse-angles

Learn how to draw acute, right, and

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www.dictionary.com/browse/obtuse-angle

www.mathopenref.com/angleobtuse.html

Definition of an

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math.tutorvista.com/geometry/obtuse-angle.html

www.mathwords.com/o/obtuse_angle.htm

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Answer

An obtuse angle is an angle that measures greater than 90 degrees and less than 180 degrees.

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In One Diagram. This diagram might make it easier to remember: Also:

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In this lesson, you'll learn what angles, right angles, and

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Note: Did you know that there are different kinds of