It is 17*(5+5+5) = 17*15 = 255 square units.
225 units squared
There is no equation - the answer is explicit in the name.A pentagonal prism has pentagonal bases. A pentagon has 5 sides. It could not be simpler!
240 units squared
Pentagon (and in 3d: triangular prism and tetrahedron.)
A pyramid with a square base, or a triangular prism.
It is 17*(5+5+5) = 17*15 = 255 square units.
225 units squared
There is no equation - the answer is explicit in the name.A pentagonal prism has pentagonal bases. A pentagon has 5 sides. It could not be simpler!
240 units squared
Pentagon (and in 3d: triangular prism and tetrahedron.)
Any prism with a base of 5 or more sides, any pyramid with a base of 7 or more sides, plus lots of miscellaneous polyhedra.
A prism has two identical polygonal bases connected by rectangular or parallelogram faces, so it has 2 sides. A pyramid has a polygonal base and triangular faces that meet at a common vertex, so it has a total of n+1 sides, where n is the number of sides of the base polygon.
Lateral area of the prism excluding the two ends: (3*20)+(4*20)+(5*20) = 240 square units
A prism has 2n vertices, where n is the number of sides in its base polygon. This is because each side of the base polygon is connected to another side by a vertical edge, and each vertex is formed at the intersection of two edges. So, a prism with a pentagonal base would have 10 vertices (5 vertices from the base polygon and 5 vertices from the top polygon).
A triangular prism has nine sides to it.
a triangular prism has 5 sides.