Alternate Interior Angles Definition Math

Notice that the two alternate exterior angles shown are equal in measure if the lines pq and rs are parallel.

Alternate interior angles definition math. The transversal crosses through the two lines which are coplanar at separate points. C and f are alternate interior angles. In the diagram below transversal l intersects lines m and n.

Alternate interior angles. 1 and 4 are a pair of alternate interior angles and 2 and 3 are another pair. Each pair of these angles are inside the parallel lines and on opposite sides of the transversal.

Each pair of these angles are outside the parallel lines and on opposite sides of the transversal. Try this drag an orange dot at a or b. Definition of alternate interior angles.

If two parallel lines are cut by a transversal the alternate interior angles are congruent. When two parallel lines are intersected by a transversal the pair of angles formed inside the parallel lines is called alternate interior angles. Alternate exterior angles are created where a transversal crosses two usually parallel lines.

The alternate interior angles are the opposing pair of interior angles formed by the transversal and the two lines. More about alternate interior angles. Alternate interior angles are two congruent angles from different parallel lines one from li l i one from on o n.

So there are actually two pairs. Alternate interior angles are a pair of angles on the inner side of each of those two lines but on opposite sides of the transversal. They lie on the inner side of the parallel lines but the opposite sides of the transversal.