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# How to Find the Surface Area of a Rectangular Prism

Finding the surface area of a rectangular prism can be an easy task if you know the length, width and height of the shape. This article will explain how to calculate the surface area of a rectangular prism using these three measurements.

## Calculating the Surface Area

To find the surface area of a rectangular prism, you need to know the length, width and height of the shape. The surface area is the total area of the faces of the prism. It is calculated by multiplying the length, width and height of the shape together.

For example, if the rectangular prism has a length of 10 cm, a width of 5 cm and a height of 2 cm, the surface area can be found by multiplying 10 x 5 x 2 = 100 cm2.

## Using the Length, Width and Height

To calculate the surface area of a rectangular prism, you need to know the length, width and height of the shape. These measurements will be used to find the surface area.

The surface area of a rectangular prism is calculated by multiplying the length, width and height of the shape together. For example, if the rectangular prism has a length of 10 cm, a width of 5 cm and a height of 2 cm, the surface area can be found by multiplying 10 x 5 x 2 = 100 cm2.

In addition to finding the surface area of a rectangular prism, you can also calculate the volume of the shape. The volume is calculated by multiplying the length, width and height of the shape together. For example, if the rectangular prism has a length of 10 cm, a width of 5 cm and a height of 2 cm, the volume can be found by multiplying 10 x 5 x 2 = 100 cm3.

Calculating the surface area of a rectangular prism is a relatively simple task when you know the length, width and height of the shape. By multiplying these three measurements together, you can easily find the surface area of the prism. In addition, you can also use the same measurements to calculate the volume of the rectangular prism.

Finding the surface area of a rectangular prism can be an easy task, with the right information. A rectangular prism has six faces, often referred to as sides, and can be found in many common objects, such as boxes, containers, and books. Knowing the surface area of a rectangular prism enables you to calculate the amount of fabric or paper needed to cover the item, or estimate the amount of paint needed to paint it.

Here are the steps to finding the surface area of a rectangular prism:

1. Measure the length, width, and height of the rectangular prism. These are often referred to as the dimensions.

2. Multiply the length and width of the prism to calculate its area.

3. Do the same for the width and height, as well as the length and height.

4. Add the three results to arrive at the surface area of the rectangle prism.

For example, if the length, width, and height are 5 cm, 4 cm, and 3 cm, the surface area would be calculated as follows:

1. Length × Width = 5 cm × 4 cm = 20 cm²

2. Width × Height = 4 cm × 3 cm = 12 cm²

3. Length × Height = 5 cm × 3 cm = 15 cm²

4. Total Surface Area = 20 cm² + 12 cm² + 15 cm² = 47 cm².

In this example, the surface area of the rectangular prism is 47 cm².

Using this example, it’s easy to see how you can find the surface area of a rectangular prism. Keep in mind that the formula for surface area is always the same, no matter what the size of the prism is. With a little practice and patience, it’s easy to master finding the surface area of any rectangular prism.

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