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20 Cards in this Set
- Front
- Back
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angle
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the figure formed by two straight lines drawn from the same point
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equal angles
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angles that can be made to coincide
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bisector of the angle
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the line through the vertex of an angle which divides it into two equal angles
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perigon
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a round angle formed by a generating line making a complete revolution
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straight angle
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an angle whose sides form one straight line extending through the vertex
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adjacent angles
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two angle that have the same vertex and a common side between them
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right angle
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one half of a straight angle
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perpendicular lines
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two lines that form right angles with each other
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the foot of the perpendicular
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the point that two perpendicular lines have in common
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acute angle
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an angle that is less than a right angle
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obtuse angle
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an angle that is greater than a right angle but less than a straight angle
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reflex angle
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an angle greater than a straight angle but less than a perigon
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oblique angle
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an angle other than a right or straight angle
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complementary angles
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angles whose sum is a right angle
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supplementary angles
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angles whose sum is a straight angle
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vertical angles,
or opposite angles |
nonadjacent angles formed by the intersection of two lines
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degree
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the unit for measuring degrees which is 1/360th of a perigon
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minute
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the unit for measuring degrees which is 1/60th of a degree
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second
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the unit for measuring degrees which is 1/60th of a minute
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protractor
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the instrument used for measuring angles
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