Hexagon.
Square
It could be a trapezoid
I think this person means the trapazoid. It has only one pair of parallel sides.
A geometric shape with only one set of parallel sides is a trapezoid.
17-12____5
It could be a trapezoid having 2 right angles, an obtuse angle and an acute angle
A trapezium. It has one set of parallel sides. It has four sides.
A quadrilateral with only one set of perpendicular sides is typically a right trapezoid or right kite. In a right trapezoid, one pair of opposite sides is parallel, and the non-parallel sides meet at right angles. In a right kite, two pairs of adjacent sides are equal, and one pair of opposite angles is equal, with one set of sides meeting at right angles.
trapezium
Cube
Set cube with front and back parallel and sides perpendicular to you. Cut diagonally though the flat top and bottom.
an octagon it has eight sides