Once your learners can confidently identify corresponding, alternate, and co-interior angles ,they are ready to begin calculating missing angles in parallel lines. Students are encouraged to state the reasons alongside each angle calculation throughout. We have produced two versions, including one with handy clues to get your students going, if necessary.

Section A begins with 4 basic questions to remind your students of the difference between the angles on parallel lines. Section B builds to include angles on straight lines, vertically opposite angles, and two step calculation problems.

This write-on worksheet has ample space for student calculations and answers, including reasons.