## Areas of Trapezoids

## Work Time

# Areas of Trapezoids

The formula for the area of a trapezoid is:

area = $\frac{1}{2}$(base 1 + base 2) • height, or *A *= $\frac{1}{2}$(*b*1 + *b*2)*h*

Use the Trapezoid interactive to explore the area of a trapezoid. Move the vertices of the trapezoid and explore what happens to the area.

- What happens if you keep the height constant and change one of the bases?
- What happens if you keep the bases constant and change the height?
- What happens if you keep the height and bases constant and change one of the angles?

INTERACTIVE: Trapezoid