You get 59 a pentadecagon is a polygon with 15 sides. imagine that you have a pentadecagonal prism; how many faces does your prism have? how many edges does your prism have? give your answer, but also explain how you came up with your answer.

Well here, this is easy so i hope i help. You said this shape has 15 sides great. seeing that a prism is a 3D figure its gonna expand right?  There's 15 sides . but don't forget about the sides faces of the prisms. There's 2 . Meaning all you have to do is count the sides and faces of the prism. Getting 17. Hope this helps.