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20 Cards in this Set
- Front
- Back
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Formed by two rays with a common endpoint; the two rays are the sides of the angle.
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Angle
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On an angle or polygon, the point where two sides intersect
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Vertex
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An angle that measures 90 degrees
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Right angle
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An angle that measures less than 90 degrees
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Acute angle
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An angle whose measure is greater than 90 degrees but less than 180 degrees
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Obtuse angle
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An angle that measures 180 degrees
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Straight angle
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Having the same size and shape
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Congruent
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A pair of opposite congruent angles formed by intersecting lines; vertical angles are congruent
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Vertical Angles
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Angles in the same plane that have a common vertex and a common side
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Adjacent Angles
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Two angles whose measures add to 90 degrees
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Complementary angles
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Two angles whose measures have a sum of 180 degrees
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Supplementary Angles
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An exact location in space; usually represented as a dot, but has no size at all
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Point
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A straight path that extends without end in opposite directions
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Line
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A part of a line that starts at one endpoint and extends forever
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Ray
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A part of a line between two endpoints
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Line segment
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A flat surface that extends forever
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Plane
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Having the same size and shape
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Congruent
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Lines that intersect to form right angles
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Perpendicular lines
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Lines in a plane that do not intersect
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Parallel lines
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Lines that lie in different planes that are neither parallel nor intersecting
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Skew lines
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