Cuadrilaterals: they are polygons with two sides and four vertices.
Parallelograms: they are cuadrilayerals with two pairs of parallels opposite equal sides and two pairs of opposite equal angles
Tipes: square, rectangle, rhomboid rhombus.
Trapeziums: only one pair of sides are parallels.
Tipes: right, isosceles, scalen, trapezoid
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