i need help with a couple of problems please

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i need help with a couple of problems please

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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first one: decide whether the polyhedron is regular and/or convex
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
okay.. the second question is describe the cross section

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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 ?
The cross section is just what shape does the cut make so: Square, hexagon and triangle
Just put the numbers into the equation and do the arithmetic for the thrir question
You can just plug those numbers in, I know you can do that, we did it last time with the angles!
I think the first cross section is a trapezoid
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
It might be a trapezoid, I can't see it too well, and yes those equations are correct, now solve! :)
NNow let her solve*
f=8 v=5 e=15

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