a polygon has: no curved sides closed connected, like no crossed lines that go beyond the angle
quadrilaterals only have for sides and polygons have 5-6
triangle, pentagon, hexagon, heptagon, octagon, nonagon, decagon, dodecagon 3 5 6 7 8 9 10 12
A four-sided polygon. The sum of the angles of a quadrilateral is 360 degrees.
A polygon is any figure that can be subdivided into triangles, which means that it has to have straight sides. A quadrilateral has straight sides, but exactly four of them. Squares, rectangles,...