Consecutive Interior Angles
Line AB and Line CH are parallel.
Angle BFG and Angle HGF are called Consecutive Interior Angles (same-side inside). What do you notice about the sum of their degree measures? Drag Point B; does this still hold true?
Angle DFB and Angle EGH are called Consecutive Exterior Angles (same-side outside). What do you notice about the sum of their degree measures?