Are the angles adjacent? Do they lie on the same side or different sides of the transversal?
Alternate interior angles
Practice makes perfect
A transversal is a line that intersects two or more coplanar lines at two different points. Now, let's analyze ∠ 11 and ∠ 13 on the given diagram.
As we can see, ∠ 11 and ∠ 13 are formed by line i and line k and transversal h. They do not share any side or a point, so they are nonadjacent. Also, ∠ 11 and ∠ 13 are interior angles that lie on opposite sides of the transversal. Therefore, the angles are alternate interior angles.
