Classify Polygons & Quadrilaterals

A polygon is a closed figure made up of straight line segments. The segments are called sides, and the points where the sides meet are called vertices.

A quadrilateral is a polygon with four sides and four vertices.

A pentagon has five sides.

A hexagon.

An octagon is a polygon with eight sides.

A decagon is a polygon with ten sides.

Parallelogram.

A trapezoid is a quadrilateral with at least one pair of parallel sides.

The sum of the interior angles of a quadrilateral is 360 degrees.

Polygons are classified as triangles (3 sides), quadrilaterals (4 sides), pentagons (5 sides), hexagons (6 sides), heptagons (7 sides), octagons (8 sides), nonagons (9 sides), and decagons (10 sides).