A trapezoid can have 2 right angles, 1 acute angle and 1 obtuse angle that all add up to 360 degrees.
This shape has only one pair of opposite sides and no right angles: <
A shape with no right angles and one pair of parallel lines would be called a trapezoid in the USA, and a trapezium in Britain.
trapezoid
A right trapezium.
A shape that has exactly 4 sides, 2 right angles and one pair of parallel sides is a rectangle. ~T
trapezoid
square
A trapezium (has only one pair of unequal parallel lines).
A trapezium (trapezoid).
Rhombus
One pair of opposite angle is greater than a right angle.
A parralelogram