Math/Geometry experts: what is the name of this shape?

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The top and bottom are parallel, but are different sizes.
The left and right sides are the same size and shape.
The front and back are the same size and shape, but they are larger than the left and right sides.
The "footprint" is a rectangle.

I have searched and can't find the correct volumetric name for this shape.
Thanks!

[darkstar]

1. Damn: I used to know this

I think....

[El Fuego]

2. I think it's a prismatoid.

[supernova]

3. Trapazoid?

[Reverend_Smitty]

4. a 3D trapezoid?

:P yeah math was never my best subject in school

[Little Wing]

5. It's a stinkin hell hole of sin

Solved!

[Zoigal]

6. How does

truncated rectangular pyramid sound?

[begin_within]

8. pretty good, but I found it in a reference book...

Frustum of a pyramid.

[NightWatcher]

7. how about a dodecahedron?

I love that name, but dont know what it is

[begin_within]

11. Here's a dodecahedron:

[NightWatcher]

14. cool, thanks

that word has been in my vocabulary since highschool when a teacher used it to describe the shape of a wart on his ass. He was a crazy chemistry nut-job

[TheMightyFavog]

22. Otherwise known as a d12.

Good for Barbarian/Thrasher hit dice, greataxes, .50 caliber sized firearms, and major military ordinance.

[liontamer]

9. trapezoidal prism n/t

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13. That's It! (yelled Charlie Brown as Lucy was knocked off her chair)

You win! Except the sides of the largest face are not parallel to each other (Y and the right side are not parallel)

[ornotna]

16. Isosceles trapezoidal prism

Thanks for your help. lol


http://www.utdanacenter.org/mathtoolkit/downloads/alg2assess/alg2_4_volumes.pdf

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18. If it's in the middle of a sentence, is "Isosceles" capitalized?

[ornotna]

20. Another subject I'm not an expert at

But I would say no.

[darkstar]

15. That's what I was reaching for....

thanks for sparing me the grief.

:hi:

[ornotna]

10. This is the best I could come up with

http://en.wikipedia.org/wiki/Isosceles_trapezoid


No, I'm not an expert. I's a start.

[trof]

12. Easy, it's a potzrebie.

[Zoigal]

17. got me interested now

As i understand it, when the top is lopped off a pyramid it becomes a pyramidal fustrum or a truncated
pyramid...So a truncated rectangular pyramid would be a special type of a pyramidal frustrum...

Or am i barking up the wrong tree?

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19. No, you're on the right track.. just keep going and don't get frustumed.

[Deja Q]

21. Dang, I wanna know what's in that big package! Trapazoidal or not!

:D

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23. Fireworks.

http://pyroking.com/hottimes.html