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15 Cards in this Set
- Front
- Back
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What is an acute angle?
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An angle that measures more than 0 degrees, and less than 90 degrees.
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What is a right angle?
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An angle that measures exactly 90 degrees.
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What is an obtuse angle?
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An angle that measures more than 90 degrees , but less than 180 degrees.
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What is an adjacent angle?
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Two angles in the same plane that have a common vertex and a common side, but do not have any other interior points in common. (Two angles touching right next to each other.)
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What are complementary angles?
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Two angles whose sum adds to be 90 degrees.
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What are supplementary angles?
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Angles whose sum adds to be 180 degrees.
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How many degrees are in a triangle?
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180 degrees
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How many degrees are in a circle?
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360 degrees
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What is a plane?
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A flat surface that goes on forever.
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What does collinear mean?
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On the same line.
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What does coplanar mean?
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On the same plane.
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What are congruent segments?
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Segments with the same measure or length.
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What are verical angles?
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The pair on angles that are directly opposite each other when tow lines intersect. (The opposite angles in an X. They are always congruent.)
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What is a linear pair?
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Two adjacent angles that make a line and add up to 180 degrees.
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What are the postulates used to prove triangles congruent?
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SSS, SAS, ASA, and AAS.
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