Triangles are polygons with three sides. There are several types of triangles. Click on the colored link above to learn more about triangles.
Quadrilaterals are polygons with four sides. They include rectangles, squares, trapezoids, parallelograms, rhombuses. Click on the colored link above to learn more about quadrilaterals.
Other polygons include pentagons, hexagons, heptagons, octagons, decagons. Click the colored link above to learn more about other polygons.