In the lesson that follows, students engage in the use of the properties of isosceles, equilateral, and right triangles! The lesson includes some of the basic terminology used when referencing the various types of triangles, and will include important angle/side relationships to be aware of while working with thees special triangles. Students will review the differences among the various types of triangle: obtuse, right, and acute. They will review terms such as "vertical angles" and they will solve problems in determining the measure of angles in a number of types of triangles. An answer page is provided for all questions and for all proofs. Enjoy!