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|  | Java Games: Flashcards, matching, concentration, and word search. |  |  
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Quadrilaterals Flash-cards, Matching, Concentration
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 | Quadrilateral | shapes with four sides and four angles |  | Trapezoid | quadrilateral with only one set of parallel sides |  | Parallelogram | quadrilateral with two sets of parallel sides and two sets of congruent sides |  | Rectangle | parallelogram with all right angles |  | Rhombus | parallelogram with all congruent sides |  | Square | parallelogram with all congruent sides and angles |  | Congruent | equal |  | Parallel lines | lines that never intersect |  | Right angles | angles with 90 degrees |  | Perpendicular lines | lines that intersect at a 90 degree angle |  
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|  |  |  |  | Tabb Middle School |  | Yorktown, VA |  |  |  |  |  | 
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