©2009 G Dear – Not to be sold/Free to use Stage 4 Years 7 & 8 Angled between Parallel Lines Co-Interior Angles Press Ctrl-A ©2009 G Dear – Not to be sold/Free to use

C shape Co-interior Angles Co-interior Angles add to 180o. They make a To see them. Press

C shape Co-interior Angles Co-interior Angles are equal. They make a 110o + 70o = 180o 110o + 70o = 180o 110o 70o

Two Co-interior Angles Exercises bo bo + 110o= 180o ao + 70o= 180o -70 -70 -110 -110 bo = 70o ao = 110o Co-interior Angles in Parallel Lines. ao 110o