Question

number of verticles in a polyhedron is 9 and number of edges is 15,then find the number of faces​

Answer 1

Answer

Step-by-step explanation :-

Solve it by using Euler's formula

F + V - E = 2
F + 9 - 15 = 2
F - 6 = 2
F = 6 + 2
F = 8

Therefore , number of edges are 8

=> A polyhedron is a solid in three dimensions.

=> It has flat faces , straight edges and sharp vertices.

=> A polyhedron has three rays.

Answer 2

$\huge\bold{Answer}$

F = 8 .

$\boxed{\bold{Step\:-\:by\:-\:step\: explaination}}$

F + V - E = 2 .
F + 9 -15 = 2.
F - 6 = 2.
F = 2 + 6 .
F = 8.

$\boxed{\bold{Note}}$ => It' has flat faces , straight edges and sharp vertices .

=> A polyhedron has three rays as three dimension.

=>It is a solid figure with many plain faces , typically more than 6.

=>Example of polyhedron => Cube , Triangular pyramid.