dildo
You can call it a "triangular prism" rather than "triangular based prism" ... saying a prism is "triangular" imply that the base is a triangle. There's no other name that I know of. A prism is just a 3d shape, so all you have to say is <type of shape> + prism to get the point across.
A Pentagon.
Altitude
An octagon-based prism.An octagon-based prism.An octagon-based prism.An octagon-based prism.
It is a triangle.
It is the height of the prism. There is no need for another name!
A prism cannot be used to name an ordered pair.
Twice the name. A prism with an n-sided base will have 2n vertices.
a hexagonal prism
Prisms (not prism's) got their (not there) name from the Greek prisma, meaning sawed.
is a prism named according to the shape of its base
The answer depends on where it is that their name is.
Triangular prism
Divide the number of vertices by 3. Find the name of the polygon with that many sides. The prism has that polygon as a base. For example, a prism with 24 vertices. Divide by 3 so that is 8. An 8 sided polygon is an octagon. The name is an octagon-based prism.
It is simply called a pentagonal prism. That is a prism based on the 2D shape known as a pentagon.
A brick, book, dresser or shelf, a toy chest or a rectangular box.
The toy doll's name is Freddy.