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Trapezium
Parrallelagram
it can but doesn't have to.
A trapezium.
trapezium
Trapezoid
Square
a trapezium
Rectangle
The four sided shape that has two parallel lines is called a trapezoid. A parallelogram is a four sided shape that has two pairs of parallel lines.
An irregular quadilateral has no 2 parallel sides . A trapezium has a par of parallel sides , which means that it HAS two parallel sides.