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quadrilaterals
If you don’t like what you’re given, change it
True, geometry has lots of rules, but moving things around doesn’t mean you’re
breaking them. By moving the shapes you created in the parallelogram around,
you were able to form a rectangle. And you know that it has the same height and
same base width as the original parallelogram. So now…you know how to find
the area of a parallelogram!
Here’s a new parallelogram lawn you’ve been asked to mow. What
should you charge for mowing it?
Parallelogram Area = Base Width × Height
Look familiar? It’s the
same formula you’d use
to calculate the area
of a rectangle.
Width
Height
The dotted line shows
the shape of the
original parallelogram.
We moved the end triangle
to form a rectangle.
45 meters
16 meters
34 meters