Question

number of faces of a polyhedron 18 and their number of vertices are 10 then find the number of edge​

Answer 1

Let, the number of edges be, 'E'

Number of faces(F) = 18

Number of vertices (V) = 10

We know that,

F+V-E = 2

∴ 18+10-E=2

⇒ 28-E = 2

⇒ -E = 2-28

⇒ -E = -26

⇒ E = 26

So, the number of edges of the polyhedron is 26.

(Ans): 26 edges.

Answer 2

Answer:

26

Step-by-step explanation:

according to the question

faces = 18

vertices = 10

the formula of polyhedron F + V = E + 2

Therefore 18+10 = E+2

28 = E+2

28-2 = E

E = 26

the answer is 26 edges