# 10.2: Area of a Parallelogram

**At Grade**Created by: CK-12

**Practice**Area of a Parallelogram

What if you wanted to find the area of a parallelogram? How does the area of a parallelogram relate to the area of a rectangle? After completing this Concept, you'll be able to solve problems like these.

### Watch This

CK-12 Foundation: Chapter10AreaofaParallelogramA

Brightstorm: Area of Parallelograms

### Guidance

Recall that a parallelogram is a quadrilateral whose opposite sides are parallel.

To find the area of a parallelogram, make it into a rectangle.

From this, we see that the area of a parallelogram is the same as the area of a rectangle. The
**
area of a parallelogram
**
is
. Be careful! The height of a parallelogram is always perpendicular to the base. This means that the sides are
**
not
**
the height.

#### Example A

Find the area of the parallelogram.

#### Example B

If the area of a parallelogram is and the base is 4 units, what is the height?

Plug in what we know to the area formula and solve for the height.

#### Example C

If the height of a parallelogram is and the area is , how wide is the base?

Solve for the base in .

Watch this video for help with the Examples above.

CK-12 Foundation: Chapter10AreaofaParallelogramB

### Vocabulary

**
Perimeter
**
is the distance around a shape. The perimeter of any figure must have a unit of measurement attached to it. If no specific units are given (feet, inches, centimeters, etc), write “units.”

**is the amount of space inside a figure. Area is measured in square units. A**

*Area***is a quadrilateral whose opposite sides are parallel.**

*parallelogram*### Guided Practice

Find the area of the following shapes.

1.

2.

3. A parallelogram with a base of 10 m and a height of 12 m.

**
Answers:
**

1. Area is .

2. Area is .

3. Area is .

### Practice

- Find the area of a parallelogram with height of 20 m and base of 18 m.
- Find the area of a parallelogram with height of 12 m and base of 15 m.
- Find the area of a parallelogram with height of 40 m and base of 33 m.
- Find the area of a parallelogram with height of 32 m and base of 21 m.
- Find the area of a parallelogram with height of 25 m and base of 10 m.

Find the area of the parallelogram.

- If the area of a parallelogram is and the base is 6 units, what is the height?
- If the area of a parallelogram is and the height is 6 units, what is the base?
- If the base of a parallelogram is 9 units and the area is , what is the height?
- If the height of a parallelogram is 11 units and the area is , what is the base?

Parallelogram

A parallelogram is a quadrilateral with two pairs of parallel sides.Area of a Parallelogram

The area of a parallelogram is equal to the base multiplied by the height: A = bh. The height of a parallelogram is always perpendicular to the base (the sides are not the height).### Image Attributions

## Description

## Learning Objectives

Here you'll learn how to find the area of a parallelogram.