Alternate Interior Angles
In the applet below, a TRANSVERSAL intersects 2 PARALLEL LINES.
When this happens, there are 2 pairs of ALTERNATE INTERIOR ANGLES that are formed.
Guiding Questions:
1) Are alternate interior angles congruent or supplementary?
2) If the pink angle above measures 25 degrees, what would the measure of its corresponding angle be? What would the measure of the gray angle be?
3) What transformation(s) are happening?