{{ item.displayTitle }}

No history yet!

Student

Teacher

{{ item.displayTitle }}

{{ item.subject.displayTitle }}

{{ searchError }}

{{ courseTrack.displayTitle }} {{ statistics.percent }}% Sign in to view progress

{{ printedBook.courseTrack.name }} {{ printedBook.name }} When a pair of lines is cut by a transversal, eight different angles are created, four around each point of intersection. The angles can be described as *interior* or* exterior* depending on where they are located. Interior angles lie inside the parallel lines, while exterior angles lie outside.

Alternate angles are the angles that lie on opposite sides of the transversal. Alternate *interior* angles are the angles that lie inside the parallel lines on opposite sides of the transversal.

In the figure above, the following angle pairs are alternate interior. $\angle3 \text{ and } \angle 5 \quad \text{and} \quad \angle4 \text{ and } \angle 6$