# Alternate Interior Angles Theorem

- Author:
- Joseph Marutollo, Tim Brzezinski

- Topic:
- 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. Interact with the applet below for a few minutes, then answer the questions that immediately follow.**Directions & Questions:**1) Complete the following statement: I

**f a transversal intersects 2 ________________ ______________, then alternate interior angles are _____________________.**2) If the pink angle above measures 134 degrees, what would the measure of its alternate interior angle be? 3) If we said that when parallel lines exist and you have a transversal that cuts through it, then we would say that the alternate interior angles are__________________________? 4) What is a converse to a statement or theorem? 5) What would the converse of statement 3 be?______________________________________________________________________________________________________________?

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