They are equal alternate angles.
Alternate Interior Angles
Alternate exterior angles
Alternate Exterior Angles are created where a transversal crosses two (usually parallel) lines. Each pair of these angles are outside the parallel lines, and on opposite sides of the transversal.
When two parallel lines are cut by a transversal, the two pairs of angles on opposite sides of the transversal and outside the parallel lines, and the angles in each pair are congruent.
They are equal alternate angles
Alternate Exterior Angles :)
Those angles are called Alternate Exterior Angles. When two lines are crossed by another line (which is called the Transversal), the pairs of angles on opposite sides of the transversal but outside the two lines are called Alternate Exterior Angles.
Alternate angles are pairs of angles that are formed when a transversal intersects two parallel lines. There are two types of alternate angles: alternate interior angles, which lie between the two lines on opposite sides of the transversal, and alternate exterior angles, which lie outside the lines on opposite sides of the transversal. When the lines are parallel, these angles are equal in measurement. This concept is commonly used in geometry to solve problems involving angle relationships.
Parallel lines can have a line crossing both of them. They call that the transversal. Corresponding angles are on the same side of the transversal. Alternate are on opposite sides of the transversal.
Alternate interior angles.
Opposite angles
Opposite angles.