I got the idea from Tina Cardone, here: http://drawingonmath.blogspot.com/2012/10/origami-angles.html It is simple, students were working & thinking and struggling and creating & verifying conjectures, talking math. Love it!

# angles

# day 34: Properties of parallel lines & transversals

It was frustrating for students to construct using geogebra, so this morning I made 2 parallel lines & a transversal & measured each angle. They got to move lines around and observe changes in angle measurements.