## Prepare a Presentation

## Work Time

# Prepare a Presentation

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

# Challenge Problem

Suppose you start with a parallelogram and then slide a pair of opposite sides in opposite directions along parallel lines.

- Predict how the area will change. Use the Parallelogram interactive to test your prediction.
- Support your prediction with data from the Parallelogram interactive.

INTERACTIVE: Parallelogram