The pentagonal prism is quite common, and very pretty to look at. If your child is studying these, it is most likely for identification purposes only, however if they are required to calculate either surface area or volume, that information is here also.
A good example of a pentagonal prism for reference purposes is the U.S. Pentagon building.
Image | |
Cross Section | |
Faces |
SEVEN- The front and back faces (2) which are pentagons, and five rectangles (5) which connect them. |
Vertices |
10 Vertices |
Edges |
15 Edges |
Surface Area |
Where: l = distance from front face to back face |
Volume |
Where: l = distance from front face to back face; B = Area of Base |
Area of Pentagon |
Your student is not expected to know or use this formula, I have put it here for interest purposes only. If your child is expected to find the area of a Pentagon, it will be by calculating the area of triangles, when they are given the value of the Apothem. Click the button below to get a full explanation of this method. |
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