Definition of a reflex angle (one whose measure is greater than 180 degrees but less than 360 degrees).
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Math Open Reference
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Definition of an obtuse angle. An angle between (but not including) 90deg and 180 deg;
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Math Open Reference
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Defines what is meant by 'interior of an angle'
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Math Open Reference
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Included definition: Angle made by two lines with a common vertex.
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Math Open Reference
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Definition of a full angle. An angle whose measure is exactly 360°.
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Math Open Reference
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Definition and properties of complementary angles - two angles that add to 90 degrees
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Math Open Reference
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A discussion of the use of this tool.
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Ask Dr. Math
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Great description on what points, lines, and angles are.
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SparkNotes
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Use your knowledge of vertical angles and supplementary angles to find the measurements for all angles. Answers included.
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Math-Drills.com
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This website is a practice worksheet for naming angles. The answer sheet is there also.
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Math-Drills.com
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