To find the surface area of a rectangular prism, we need to calculate the area of each of the six faces and then add them all together.
The rectangular prism in the image has dimensions:
- Length = 8 inches
- Width = 4 inches
- Height = 2.25 inches
Now, let's calculate the area of each face:
1. Top face: 8 inches x 4 inches = 32 square inches
2. Bottom face: 8 inches x 4 inches = 32 square inches
3. Front face: 2.25 inches x 4 inches = 9 square inches
4. Back face: 2.25 inches x 4 inches = 9 square inches
5. Left face: 2.25 inches x 8 inches = 18 square inches
6. Right face: 2.25 inches x 8 inches = 18 square inches
Now, add up all these areas to find the total surface area:
32 + 32 + 9 + 9 + 18 + 18 = 118 square inches
Therefore, the surface area of the rectangular prism is 118 square inches.
unit 7 lesson 5
surface area of rectangular prisms practice
use the image to answer the question
4in., 2.25in., 8in.
what is the surface area of the rectangular prism?
_ in. ^2
1 answer
1 answer