PBS
Pbs Learning Media: Classifying Polygons
This interactive diagram focuses on sorting polygons by common properties and then you select the correct label for each section of the Venn Diagram.
Khan Academy
Khan Academy: Coordinate Plane Word Problems: Polygons
Solve all sorts of word problems with crazy contexts that use polygons on the coordinate plane. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.