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### 20 Cards in this Set

• Front
• Back
 equilateral a regular triangle obtuse angles that measure between 90 and 180 degrees angle bisector a ray that divides an angle into two angles of equal measure supplementary angles two angles that add up to 180 vertical angles nonadjacent angles of two intersecting lines parallelogram a quadrilateral with opposite sides parallel and equal square a rectangle that is a rhombus right triangle a triangle with perpendicular legs square a regular quadrilateral isosceles a triangle with two equal legs adjacent angles two angles that share a common ray and endpoint congruent angles two angles that have the same measure linear pair two adjacent angles for which the noncommon rays form a straight line (adjacent and supplementary) trapezoid a quadrilateral with one set of parallel sides scalene a triangle with no sides congruent acute angles angles that measure between 0 and 90 degrees hypotenuse side opposite the right angles in a triangle congruent angles angles with equal measures angle bisector the ray common to two adjacent congruent angles perpendicular lines that intersect to form right angles