anonymous
  • anonymous
please help me
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
How?
anonymous
  • anonymous
i need help with a few geometry questions
anonymous
  • anonymous
the first one is calculate the number of vertices of the solid, given that it has 7 faces, 2 pentagons and 5 triangles
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anonymous
  • anonymous
10... count the "points"
anonymous
  • anonymous
However I don't see any triangles I see 5 rectangles
anonymous
  • anonymous
the second one is: Determine whether each solid is a polyhedron.
anonymous
  • anonymous
well for the first one it says to uses this formula f+v=e+2
anonymous
  • anonymous
Figure out what f v and e are. I think f is faces and v is verticies
anonymous
  • anonymous
f is number of faces, v is vertices, e is edges
anonymous
  • anonymous
That would be faces + vertices = edges + 2 faces = 7, (those are flat surfaces) edges = 15 (those are like the edge of a table) 7 + v = 15 + 2 7 + 10 = 15 + 2 Vertices = 10
anonymous
  • anonymous
The second question is yes for both.. Definition is a solid with flat faces
anonymous
  • anonymous
decide whether the polyhedron is regular and/or convex

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