I think 5 but if its a solid figure like pentagonal prism it got 10 and if pyramid six
Pentagonal (not pentaginal). 7 faces 15 edges 10 vertices
A triangular prism has 9 edges.
A prism with an n-sided base will have 2n vertices, n + 2 faces, and 3n edges.
You add up all the sides and you should get 5!
Prisms (not prism's) got their (not there) name from the Greek prisma, meaning sawed.