qh_shelby
Feb 22, 2009, 07:26 PM
The sides are 6m by 8.1m and the pentagon has a 7.2m apothem(?) and 6 m sides. Is there a formula for this? Please help ASAP!
Perito
Feb 22, 2009, 08:42 PM
I'm a little confused by your dimensions, but the basic formula for any solid with a uniform cross-section is the area of the face times the height.
This link shows how to calculate the area of a regular pentagon.
Geometry Finding the Area of a Pentagon (http://www.math-prof.com/Geom/Geom_Ch_26.asp)
Multiply that area by the height of the prism and you have the volume.