Corresponding, Alternate and Co-interior Angles

Start with the vocabulary

The resources introduce corresponding, alternate and consecutive interior angles alongside parallel lines and transversals. Start with the definition flashcard deck for a look at interior and exterior angles, then use Transversals Vocab to review the names of angle pairs. As you study, compare the terms on the cards with the angle pairs you see in diagrams.

For a broader view, the mind map on parallel lines and transversals brings several angle pairs together, including corresponding, alternate interior and consecutive interior angles.

Move from names to relationships

Parallel Lines Reasons sets out relationships for corresponding, alternate and co-interior angles. Use it after the vocabulary cards to connect each name with a reason. You can then look at Parallel Lines and Angles Theorems and Postulates for statements covering corresponding angles and alternate interior and exterior angles.

The slide sets on corresponding and alternate angles offer another way to look at the pairs in angle diagrams. Try comparing their descriptions with the terms on the flashcards.

Combine a map with a quiz

Use the parallel lines and transversals mind map to review the angle-pair names before trying the geometry quiz. The quiz includes a question about finding an unknown value when lines are parallel. It also shows reasoning using supplementary same-side interior angles.

Afterward, return to the map or flashcards and check any term or relationship you want to study again. Teachers can also use these resources when choosing material on angle pairs.

Explore the unit

This topic is one section of Angles and Parallel Lines in Mathematics. The resources connect angle-pair vocabulary with relationships used when working with parallel lines. Explore a mind map, then choose a quiz question to practice using those connections.