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10 Cards in this Set
- Front
- Back
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side
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A ray that is part of an angle
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angle
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Two rays that share a common endpoint called a vertex
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vertex
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The common endpoint of the two rays that form an angle.
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degree
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The most common unit of measure for an angle.
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right angle
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An angle whose measure is exactly 90 degrees. This is the angle by which all other angles are compared. It is the "complete" angle.
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acute angle
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An angle with a measure greater than 0 degrees and less than 90 degrees.
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obtuse angle
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An angle with a measure greater than 90 degrees and less than 180 degrees.
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straight angle
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An angle with a measure of 180 degrees. This angle is also called a line.
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complementary angles
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Two or more angles whose sum is 90 degrees.
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supplementary angles
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Two or more angles whose sum is 180 degrees.
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