Question

i need help with a couple of problems please

Answer 1

first one: decide whether the polyhedron is regular and/or convex

Answer 2

First one and last one are regular because all their sides have one line through them this they are the same. The second one is concaved on some axiom and is not a regular polyhedron

Answer 3

okay.. the second question is describe the cross section

Answer 4

and the third question is: using f+v=e+2 find the unknown number
1) faces:? vertices: 6 edges: 12
2) faces 5, vertices ?, edges 8
3) faces 7, vertices 10, edges ?

Answer 5

The cross section is just what shape does the cut make so:
Square, hexagon and triangle

Answer 6

Just put the numbers into the equation and do the arithmetic for the thrir question

Answer 7

You can just plug those numbers in, I know you can do that, we did it last time with the angles!

Answer 8

I think the first cross section is a trapezoid

Answer 9

faces:? vertices: 6 edges: 12 f + 6 = 12 + 2
2) faces 5, vertices ?, edges 8 5 + v = 8 + 2
3) faces 7, vertices 10, edges ? 7 + 10 = e + 2

Answer 10

It might be a trapezoid, I can't see it too well, and yes those equations are correct, now solve! :)

Answer 11

NNow let her solve*

Answer 12

f=8
v=5
e=15