How do you know the number of faces/edges/vertices when only 2 of the 3 are given to you?

Question

pooja195 · Answer

anonymous · Answer

I don't have an image in front of me, only the measures. Yet I'm not very familiar with the Euler's formula. :/

pooja195 · Answer

pooja195 · Answer

post wat u deleted back leemmmee see it

anonymous · Answer

Solid 1
Faces: 8
Vertices: x
Edges: 15

Solid 2
Faces: y
Vertices: 16
Edges: 24

pooja195 · Answer

since u have 8 faces there has to be 8 vertices

anonymous · Answer

So the faces & the vertices are always the same?

pooja195 · Answer

well not always for yr secound one im not sure but im thinking 8 because if u dived 16 by 2 u get 8

anonymous · Answer

Thank you @pooja195 (: