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### 20 Cards in this Set

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• Back
 when figures are the same size and shape congruent figures an angle with a 90 degree square corner right angle the distance across a circle through its center diameter an angle smaller than a right angle acute angle an angle larger than a right angle obtuse angle a figure that is formed when two lines, or rays, meet angle the distance from the center of a circle to any point on the circle radius when halves of a shape or design match or are congruent symmetry a motion in which a figure moves in one direction slide (translation) a pair of numbers or letters that names a point on a grid ordered pair a move that makes a figure face in the opposite directions flip (reflection) rotating a figure around a point turn (rotation) a straight path that extends in both directions line a part of a line and has two end points line segment a part of a line and has one endpoint ray You can form an angle by drawing two rays that meet at the same endpoint. The point is called a... vertex a closed figure made of line segments polygon a polygon with 4 sides and 4 vertices quadrilateral a quadrilateral made of parallel lines on opposite sides parallelogram has 4 sides and 4 vertices, but only one pair of sides is parallel trapezoid