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Question 194691: I need help in explaining this to my 5th grade daughter. Please illustrate the following for me: A 3-D right prism shape has these dimensions: H=6 cm, L=3 cm, and W=4 cm.
1) What is the perimeter if we know all 3 dimensions?
2) Is it possible to solve: H= 6 cm and W = 4cm, but L=x? How do I solve for “x”?
3) Is it possible to solve: H=6 cm, L= 3 cm, but W=x? How do I solve for “x”?
I appreciate any help I can as soon as possible! Thanks.
Answer by solver91311(24713)   (Show Source):
You can put this solution on YOUR website!
The best illustration I can give you for a right rectangular prism is to have you go get a cereal box out of your pantry. Of course, you would have to change the dimensions, but the shape is the same -- actually the size described here is closer to one of those little boxes they serve juice in nowadays.
However, I have a feeling that you aren't telling the whole story here. What you are asking doesn't make much sense. Perimeter is a measure of the distance around a plane figure, and doesn't have any meaning in relation to a solid figure -- unless you are talking about the perimeter of one of the faces of your prism.
http://www.eduplace.com/math/mw/background/4/10/te_4_10_overview.html has a good 4th grade lesson on perimeter, area, surface area, and volume. Take a look and if you still have questions, write me a note and I'll see what I can do for you.
John
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