Summary

Lesson 2: Transversals - Summary

   Summary

Download a copy of the summary. Word version or PDF version.

Review what you have learned prior to completing the Lesson Assignment.

Key Ideas

• A transversal is a line that crosses two other lines.
• For there to be certain special relationships between angles, the lines crossed by a transversal must be parallel.
• Angles that are vertically opposite, corresponding, alternate interior, or alternate exterior will have the same measure.
• The sum of complementary angles is 90°.
• The sum of supplementary angles is 180°.
• The sum of the interior angle measures in a triangle is 180°.

Key Terms

• parallel lines
• perpendicular lines
• transversal
• vertically opposite angles
• corresponding angles
• adjacent angles
• alternate interior angles
• alternate exterior angles
• supplementary angles
• complementary angles
• interior supplementary angles
• exterior supplementary angles

2014 © Alberta Distance Learning Centre