This booklet is a great resource for teaching students how to prove certain properties of polygons on the coordinate plane. Students will explore 9 different polygons, and find slopes and lengths to prove different properties of about them. It is designed to include 2 polygons done together, and then a 3rd that they do for homework (they must name the shape based on the properties). There are 9 polygons, so it could span over 3 days.