Alternate Interior And Exterior Angles Definition

Alternate interior angles definition when a transversal intersects parallel lines it creates an interior and exterior.

Alternate interior and exterior angles definition. These angles are called alternate interior angles. The angles which are formed inside the two parallel lines when intersected by a transversal are equal to its alternate pairs. Alternate interior angles create a z alternate interior angles are used to prove triangles are congruent by sas asa aas.

One way to identify an alternate exterior angle is to see that they are the vertical angles of the alternate interior angle. Alternate interior angles definition. Alternate interior angles lie between the lines cut by the transversal.

An alternate exterior angle is equal to one another. Alternate exterior angles lie outside the lines cut by the transversal. If the two lines are parallel then the alternate exterior angles are congruent.

Alternate exterior angles are created in the space outside the parallel lines on alternating sides. Play with it below try dragging the points. Try this drag an orange dot at a or b.

Therefore the alternate angles inside the parallel lines will be equal. Notice that the two alternate exterior angles shown are equal in measure if the lines pq and rs are parallel. When the two lines are parallel alternate exterior angles are equal.

When two lines are crossed by a transversal the opposite angle pairs on the outside of the lines are alternate exterior angles. In the above given figure you can see two parallel lines are intersected by a transversal. Each pair of these angles are outside the parallel lines and on opposite sides of the transversal.