A prism with an n-sided base will have 2n vertices, n + 2 faces, and 3n edges. 18 base edges and 9 lateral edges
Assuming a regular decagon is the base of the prism, it would be 10 faces. With an irregular decagon, it is possible that two (or more) of the edges of the decagons are perpendicular, so all 12 faces could have perpendicular edges.
A pentagonal prism has 15 edges. 10 of these are base edges and then 5 lateral edges. Formula : A prism with a n-sided polygons at each end will have 3n edges.
338
42
An octagonal prism has a base with eight edges.
faces= seven edges=fifteen vertices=ten
Depends on the type of prism.In Euclidean geometry, a prism is a three dimensional figure, or solid, having five or more faces, each of which is a polygon. Polygons, in turn, consist of any number of straight line segments, arranged to form a flat, closed, two-dimensional figure. Thus, triangles, rectangles, pentagons, hexagons, and so on are all polygons. In addition, a prism has at least two congruent (same size and shape) faces that are parallel to one another. These parallel faces are called bases of the prism, and are often associated with its top and bottom. The remaining faces of a prism, called lateral faces, meet in line segments called lateral edges. Every prism has as many lateral faces, and lateral edges, as its base has sides. Thus, a prism with an octagonal (eight sided) base has eight lateral faces, and eight lateral edges.
A nonagonal prism.
A pentagonal prism has 10 right angles, formed from perpendicular edges. It has one for each angle made when a face meets a base. Since it has 5 faces and 2 bases, there are 10 right angles.
Perimeter of base*Length of prism.
The lateral area is the perimeter of the hexagon times the height (altitude length) of the prism. Same for any other prism.