# Measuring the Area of a Parallelogram: Formula & Examples

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• 0:05 A Parallelogram
• 1:24 The Formula
• 1:48 Using the Formula
• 3:08 Lesson Summary

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Lesson Transcript
Instructor: Yuanxin (Amy) Yang Alcocer

Amy has a master's degree in secondary education and has taught math at a public charter high school.

Watch this video lesson to learn the simple formula to find the area of a parallelogram. Learn what measurements you need, how to label your parallelogram, and how to use the formula.

## A Parallelogram

A parallelogram is a four-sided flat shape with two pairs of equal parallel sides. This is to say that the opposite sides of a parallelogram are both equal to each other and parallel. The two pairs of opposite sides do not necessarily have to be the same length. You can have two different lengths for the two pairs.

A good way to picture a parallelogram is to picture a leaning box. If you take a moving box and punch out the ends, lean it against a wall, and then look at the opening, you would be looking at a parallelogram. It's a leaning rectangle!

In order to find the area of a parallelogram, we need to label our measurements. There are only two measurements that we need to be concerned about. If our parallelogram is sitting on a flat surface, the first measurement we need is the length of the bottom side. This we can label with a b for base. We call this the base because it is the bottom of the parallelogram.

The next measurement we need is the height of the parallelogram. This is the straight up and down measurement from the bottom to the top. We can label this measurement h for height. Note that this is not how long the leaning sides are, but the distance between the bottom side and the top side.

## The Formula

The formula to find the area of a parallelogram is this one:

Area = b * h.

Do your best to memorize this formula for the area of a parallelogram. With your parallelogram sitting flat, remember that to find the area, all you need is to multiply the length of the flat sides with how tall the parallelogram is. Only two numbers to worry about.

## Using the Formula

Let's see how this formula works with an example.

We have a parallelogram here:

I see that it's sitting flat. I also see that the flat sides measure 6 inches, the leaning sides measure 4 inches, and it has a height of 3 inches.

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