Quote:
Originally Posted by Desperdo  Hi i'm having a little trouble understanding how to find the volumn of the triangular prism and pyramid.
The Triangular Prism
B=12 ft sq.
h=7 ft sq. Mr F asks: So what's B?? The area of the base (ie the constant cross section area)?? And if h is the height, then the unit will be ft, not sq ft. Greater clarity is needed.
Triangular Pyramid
B=12 ft sq.
h=7 ft Mr F asks: So what's B?? The area of the (triangular) base?? Greater clarity is needed.
Any help would be really appreciated  |
As I'm sure your textbook and/or class notes would say (complete with diagrams and probably a variety of detailed examples):
A pyramid whose height is h units and whose base has area B has a volume V = 1/3 B h cubic units. The base can be a square (square pyramid), triangle (triangular pyramid), circle (cone) etc.
A prism whose length is h units and whose cross-section has area B has a volume V = B h cubic units. The cross-section can be a rectangle (rectangular prism or box), triangle (triangular prism), circle (cylinder) etc.
Your questions provoke the strongest possible advice that you go back and thoroughly review all material made available to you on this topic. 
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