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Level 140

Geometry III: Quadrilaterals


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Quadrilateral
A polygon with 4 sides and 4 angles.
Rectangle
four sides; opposite sides congruent and parallel
Square
four congruent sides; all angles are right angles
Parallelogram
four sides; opposite sides are congruent and parallel
Rhombus
four congruent sides; opposite sides parallel; opposite angles congruent
Trapezoid
four sides; exactly one pair of opposite sides parallel
360 degrees
sum of angles in quadrilaterals