This resource has been contributed by Winpossible, and can also be accessed on their website by clicking here - Identify Special Angle Pairs
In this section, you'll learn with the help of video lesson how to identify special angle pairs i.e. angles formed when a transversal cuts (or intersects) parallel lines. E.g. the most important angles are called alternate interior angles, alternate exterior angles and corresponding angles.
The basics to remember:
- Interior means ‘Between’ the parallel lines.
- Exterior means ‘Outside’ the parallel lines.
- Alternate means "alternating sides" of the transversal
When two parallel lines are cut by transversal line, you have an interior section between the two lines and exterior section above and below the two lines. We have interior angles 3, 4, 5, and 6, and exterior angles are 1, 2, 7, and 8. Alternate interior angles are angles which are on alternate sides of the transversal or different sides of the transversal. Angle 3 and 6, 4 and 5 are the pairs of alternate interior angles. Angles drawn on the same side of the transversal in the interior section are called same-side interior angles. Angle 3 and 5, 4 and 6 are the pairs of same side alternate interior angles. Corresponding angle pairs are angles that appear in corresponding positions. Angle 1 and 5, 2 and 6, 3 and 7, 4 and 8 are the pairs of corresponding angles.
This FREE mini-lesson is a part of Winpossible's online course that covers all topics within Geometry. Click on the video below to go through it. If you like it, you can buy our online course in Geometry by clicking here.