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20 Cards in this Set
- Front
- Back
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formed by two rays with a common vertex
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angle
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angle measuring less than 90 degrees
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acute angle
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angle measuring exactly 90 degrees
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right angle
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angle measuring more than 90 but less than 180 degrees
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obtuse angle
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extends forever in both directions
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line
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part of a line with two endpoints
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line segment
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part of a line with 1 end point extending in 1 direction
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ray
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the point where 2 lines meet
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vertex
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names an exact location
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point
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a flat surface that extends forever in all directions
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plane
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exactly the same shape but different sizes
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similar
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exactly the same size and shape
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congruent
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congruent angles that are opposite of each other and formed when two lines intersect
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vertical angles
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2 angles whose sum is 90 degrees
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complementary angles
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2 angles whose sum is 180 degrees
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supplementary angles
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the line that intersects 2 parallel lines
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transversal
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2 lines that never intersect
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parallel lines
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2 lines that cross to form right angles
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perpendicular angles
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angles that lie in the same location on parallel lines cut by a transversal
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corresponding angles
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angles that lie INSIDE 2 parallel lines but are on opposite sides of the transversal
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alternate interior angles
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