One of These is Not Like the Other

Short laugh for you Math people out there!  We are working on recognizing 3D shapes in my Honors class this week.  While "discovering" the names together, we came across a figure that had rectangles as bases.  Keep in mind that we had been using words like "pentagonal," "hexagonal," and "octogonal."  My students correctly decided that it was a prism.  Feeling VERY sure of himself, one of my students yelled out "RECTAGONAL!"  I am so glad I have a classroom where we can laugh with each other and continue learning!