Math terms and their definitions: geometry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Line | A length that goes in two opposite directions without end
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Ray | Has one endpoint and goes without end in one direction
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Line Segment | A part of line with two endpoints
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Plane | A flat surface that extends without end
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Parallel Lines | Lines that never meet
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Intersecting Lines | Lines that meet at a point
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Angle | Formed by two rays with the same endpoint
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Vertex | Point of intersection of the sides of an angle
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Protracter | Tool to measure and draw angles
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Degrees | Unit of measure for angles
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Right Angle | Measures exactly 90 degrees
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Acute Angle | Less than 90 degrees
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Obtuse Angle | More than 90 degrees
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Straight Angle | Measures exactly 180 degrees, a straight line
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Complementary Angles | Add up to 90 degrees
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Supplementary Angles | Add up to 180 degrees
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Vertical Angles | Angles opposite each other when two lines intersect
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