Exequelle's BOB

Surface Area of A Rectangular Prism

The surface area is the area of all the sides added up, how much area the object has.

A net is how an object would look if it was flattened. It would look like this. From a rectangular prism into its net.

Now to answer the question you have to use the formula:
2(W*H)+ 2(H*L) + 2(L*W)= The surface Area.

W= 8cm2

L = 4cm2
H = 1cm2

Basically you just fill in the all of the blanks.

2(W*H)+ 2(H*L) + 2(L*W) =

2(8cm2 x 1cm2) + 2(1cm2 x 4cm2) + 2(4cm2 x 8cm2) =
2(8cm2) + 2(4cm2) + 2 (32cm2) =

16cm2 + 8cm2 + 64cm2 =

Surface Area = 88cm2

Another way is to add up all of the areas of each rectangle in the net:

32cm2 + 32cm2 + 8cm2 + 8 cm2 + 4cm2 + 4cm2 =88cm2

Volume of a Rectangular Prism

Volume is how much space the object takes up.

The formula to find the volume of a rectangular prism is:
(W x L) x H = Volume

W = 8

L = 4

H = 1

Again you plug in the numbers.

(W x L) x H = Volume

(8 x 4) x 1cm =

(32) x 1 =

Volume = 32cm3

Another way to do this is B x H. If you didn't know the base is Width x Length.
Base = 32 Height = 1 32 x 1 = 32cm3