A rhombus is a 4 equal sided quadrilateral with equal opposite acute angles and equal opposite obtuse angles with diagonals that bisect each other at right angles.
QUADRILATERAL
A Rhombus
Square
I am a rectangle.
Rectangle or a square.
a pentagon
polygon
It is a quadrilateral whose opposite sides are parallel and has no right angles
a rhombus, a quadrilateral without right angle, a quadrilateral with equal opposite parallel sides but no right angles
A parallelogram is a quadrilateral whose opposite sides are parallel and has no right angles
A square