Polygons that are rectangular
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One part of a coordinate system. More than this is required.
They are lines that are not horizontal nor vertical.
A shape with more than 10 sides may be called a polygon - but only if all the sides are straight lines - and there is nothing in the question to suggest that they are.
A circle (infinitely many lines of symmetry), ellipse, rectangle, and all regular polygons.
A parallelogram always has one set of parallel lines, plus another set also.A trapezoid (trapezium) always has exactly one set of parallel lines and no more.Any shape with more than four sides can have one set of parallel lines, but doesn'tnecessarily have to.