## Prepare a Presentation

## Work Time

# Prepare a Presentation

- Select one of your conclusions about what happens to the area of a triangle when you change one or more variables.
- Be prepared to demonstrate your conclusion using the Triangle interactive, and to support your thinking mathematically.

# Challenge Problem

Suppose the base of a triangle lies on one of two parallel lines, and the vertex opposite the base lies on the other parallel line.

- If you slide the vertex along the line, what do you think will happen to the area of the triangle? Use the Triangle interactive to test your prediction.
- Explain your results.

INTERACTIVE: Triangle