1. Surface Area of a Space Figure
Rectangular Prism

2. What is Surface Area?
The sum of the areas of all the surfaces of a solid figure

3. What is a Rectangular Prism?
It is a space figure.
Its bases are rectangular, congruent, and in parallel planes.
The other faces are all rectangles.
It is a box.

4. Rectangular Prism This is the rectangular prism we analyzed.
It is a cereal box from our kitchen.
It has six rectangular faces.
It stands tall.

5. Area of Face A
To find the area of a rectangle, multiply its length and width.
The area of face a is 6.5 x 9.5 = sq. in.
The face opposite a has the same area. a
9.5 in
6.5 in

6. Area of Face F The area of face f is 9.5 x 2 = 19 sq. in.
The face opposite f has the same area. a
9.5 in. f
2 in.

7. Area of Face B The area of face b is 6.5 x 2 = 13 sq. in.
The area opposite b has the same area. a f

8. Surface Area
The surface area is the sum of the area of the faces that form the solid.
The surface area of this rectangular prism is:

9. Surface Area Calculations
2(61.75) =123.5 sq. in. +
front + back
side + side +
2(19) = sq. in.
top + bottom
2(13) = sq. in. +
187.5 sq. in.

10. Surface Area of this Box
The surface area of the cereal box is square inches.