Analyzing The Formula of A Parallelogram & Trapezoid

Areas of Parallelograms

Work Time

Areas of Parallelograms

The formula for the area of a parallelogram is:
area = base • height, or A = bh

Use the Parallelogram interactive to explore the area of a parallelogram. Move the vertices of the parallelogram and explore what happens to the area.

  • What happens if you keep the height constant and change the base?
  • What happens if you keep the base constant and change the height?
  • What happens if you keep the height and base constant and change one of the angles?

INTERACTIVE: Parallelogram

Hint:

To increase the height, move the top side farther away from the base.