#### polygons [2]

Geometric plane figures with several sides and a number of equal angles.

#### regular heptagon

Polygon with seven (hepta = seven) sides and equal angles.

#### regular pentagon

Polygon with five (penta = five) sides and equal angles.

#### quadrilateral

Any plane figure with four sides and four angles.

#### regular hexagon

Polygon with six (hexa = six) sides and equal angles.

#### parallelogram

Trapezoid whose opposite sides are parallel and of equal length; the sides do not meet at right angles.