Exploring Triangles

Today first graders explored a new set of shapes called Power Polygons.  It was a great way to start delving into an investigation of triangles to figure out what exactly makes a triangle a triangle.   We discovered that some of the shapes that we thought looked kind of like a triangle but were "too skinny" or "sideways" or "upside down", were in fact, actually real triangles!! 
Students also had a chance to create their own triangles using geoboards and rubber bands, as well as drawing them on dot paper.