How to calculate the surface area and volume of a hexagonal prism?

Well its my first time using this and I hope I get the answer pretty quick I'm doing a project of this and I made it out of wood... and I need to find the S A of a icosahedron... and the side length of 1 of the triangles is 4 inches... I'm kind of lost on how to do this and help would be...

This is countrygirl's daughter, wondering if someone could give me the formula for the"total surface area of a cylinder"? Thank you.

Can someone please explain to me how I would get the surface area of a parallelepiped if I'm given three vectors of the parallelepiped. *parallelepiped is parallelogram only 3-dimensional. Also what's the difference between geometric and algebraic vectors? Edit: I know surface area = 2lw...

Hello! I am having difficulty answering this question. If someone can please tell me how to solve these geometry problems, I will be very grateful! Thank you in advance! =) Find the surface area of the following regular polyhedra to the nearest cm^2 (squared). a. Tetrahedron with edge length...