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Transcript

Congruence When two figures have the exact same size and shape Plane A two dimensional figure, length and width Line Symmetry When a figure can be cut or folded in a way that the figures on either side of the line are mirror images Line of Symmetry The fold, cut, or line on which symmetry exists Similar When figures are the same shape but different sizes (proportions of sides and angles remains the same even though he figure may grow or shrink) Straight, continues forever in both directions Line Line Segment Straight with a fixed length, two endpoints Ray Begins at one endpoint and continues in the other direction forever Angle When two rays are connected by a common endpoint Vertex The endpoint in which two rays have in common to create an angle Right Angle A 90 degree angle (a corner) Perpendicular When two lines intersect to create right angles Parallel When two lines will never intersect, they remain an equal distance apart Properties of Quadrilaterals Polygon Closed figure (no gaps) with at least three sides, no curved sides Quadrilateral A four sided polygon Trapezoid Figure with one set of parallel lines Isosceles Trapezoid Figure with one set of parallel lines and one set of congruent lines Parallelogram Figure in which all opposite sides are parallel Rhombus Quadrilateral with four congruent sides Rectangle Quadrilateral in which opposite sides are congruent and parallel, four right angles Square Quadrilateral with four congruent sides and four right angles