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### 10 Cards in this Set

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• Back
 supplementary angles two angles whose measures have a sum of 180 degrees complementary angles two angles whose measures have a sum of 90 degrees vertical angles a pair of opposite angles formed when two lines meet at a point perpendicular lines two lines that intersect to form a right angle - the symbol is: ⊥ regular polygon a polygon with all sides equal in length and all angles equal in measure quadrilateral a polygon with four sides trapezoid a quadrilateral with exactly one pair of parallel sides parallelogram a quadrilateral with both pairs of opposite sides parallel rhombus a parallelogram with four congruent sides line symmetry when a figure can be divided into two parts that are mirror images of each other