This is a lesson I created for students (11th and 12th graders) wanting to assess their knowledge of different types of triangles (namely, right, isosceles, and equilateral). 

 Use of JAVATM made possible by:
Ericson, B., & Guzdial, M. (2007). Introduction to computing & programming in Java: A multimedia approach. Upper Saddle River, NJ: Pearson Prentice Hall.