## Question 1

What do you notice about the two angles when you slide the two sliders? What do complementary angles add up to?

## Question 2

What do you notice about these two angles? What do supplementary angles add up to?

## Vertical Angles

__Vertical angles__are angles that are across from each other when two lines intersect.

## Question 3

What do you notice about the angle measures of vertical angles?

## Transversal

A

__transversal__is a line that intersects two parallel lines.## Question 4

First, check the "Show Corresponding Angles" box. What do you notice as you slide the first slider?

## Question 5

Now, check the "Show Alternate Interior Angles" box. What do you notice as you slide the first slider?

## Question 6

Lastly, check the "Show Alternate Exterior Angles" box. What do you notice as you slide the first slider?