1
a quadrilateral having both pairs of opposite sides parallel to each other
2
a parallelogram having four right angles
3
a quadrilateral plane figure having two parallel and two nonparallel sides
4
a polygon with 5 sides and 5 angles
5
a polygon having eight angles and eight sides
6
a polygon having six sides and six angles
7
a closed plane curve consisting of all points at a given distance from a point within it called the center
8
a rectangle having all four sides of equal length
9
an equilateral parallelogram having oblique angles
