# Transversals with Parallel Line Exploration 2

- Author:
- David DeShetler, Tim Brzezinski

- Topic:
- Angles, Straight Lines

## Step 1

In the applet below, a

**TRANSVERSAL**intersects**2 PARALLEL LINES**. First, look at the four different pairs of angles by checking the boxes on the right of the applet, then answer the first question.## Step 2

Use the sliders on the right to move the lines and change the angles. As you move the lines use the "

**Slide Me!**" slider to determine how the angles are effected by these changes. After you have tried this several time answer Questions 2 thru 4. NOTE: The two lines intersected by the transversal will remain parallel at all times!## Question 2

Complete the following statement: ** If a transversal intersects two ________________ ______________, then ________________ _____________________ angles are _____________________.**

## Question 1

What type of angles are these?

## Question 3

If the gray angle above measures 120 degrees, what would the measure of its same-side interior angle be?

## Question 4

Would your answer remain the same in Question 3 if the lines were not parallel?