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16 Cards in this Set
- Front
- Back
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These lines never touch
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parrell lines
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A line that intersects parrell lines is called _________.
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transversal
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this means opposite angles
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Vertical angles
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Tthis means the same in math terms
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congruent
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straight line
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180 degree
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two lines intersect to make four right angles
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perpendicular lines
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lines that cross each other
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intersecting lines
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lines that go up and down
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vertical lines
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Any of the four angles formed between two straight lines intersected by a third straight line.
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interior angle
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any pair of angles that have the same relative position at each intersection where a straight line crosses two others
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corresponding angles
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Two angles whose sum is 90°.
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Complementary angles
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The angle or arc that when added to a given angle or arc makes 180° or a semicircle
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supplementary angle
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When a transversal intersects two lines
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alternate interior
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when a transversal intersects two lines
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alternate exterior
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a plane polygon which is both equilateral and equiangular.
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regular polygon
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a polygon whose interior angles are not equal and/or its sides are not equal in length
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irregular polygon
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