Cirillo, Michelle2015-05-042015-05-042015-05-04http://udspace.udel.edu/handle/19716/16743This applet was designed to be used with the "Mathematics Discourse in Secondary Classrooms" professional development materials. The applet allows the user to explore questions about how the area and perimeter of a triangle interact with one another. The applet works with free Geogrebra open source software which may be downloaded from this site: https://www.geogebra.org/Software