Use Geogebra to determine if triangles are similar when they have two pairs of congruent angles. The exploration sheet and this Geogebra applet will start you on your way. The investigation sheet is available for download.
Stacie Bender taught high school mathematics and technology courses for 17 years. She was the Director of Training at Managed.com for four years. She returned to the classroom teaching geometry, algebra II, and honors precalculus in August, 2015.