A pentagon (5-sides), hexagon (6-sides), heptagon (7-sides), and octagon (8-sides) are all examples of shapes with more than four straight sides.
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A shape with four sides has more vertices because there are more points where edges (straight lines) meet than a 3-sided shape.
polygon
A shape with straight sides is called a polygon. But it can have 3 or 4 sides as well.
A straight line
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, parallelograms are all quadrilaterals and polygons.A polygon has 3 or more sides whereas quadrilaterals are 4 sided polygons