Learn about the properties of 2-D shapes: circles, triangles, polygons, and quadrilaterals. Includes information, video, and examples about each, with games and quizzes for reinforcement.

In this game, you must send rescuers to ships trapped in the Bermuda Triangle by first decoding their coordinates that were given to you as quadratic expressions. As you decode the coordinates, you must draw a search area on a grid that...