Question

Sum of number of pentagonal and
rectangular faces is x in truncated
pentagonal bipyramidal geometry, then
find the value of 2x.​

Answer 1

2x = 14

Step-by-step explanation:

The pentagonal bipyramid is third of the infinite set of face-transitive bipyramids.

• Each bipyramid is the dual of a uniform prism.
• Although it is face-transitive, it is not a Platonic solid because some vertices have four faces meeting and others have five faces.
• The pentagonal bipyramid, dt{2,5}, can be truncated, trdt{2,5}.
• The dual of the Johnson solid pentagonal bipyramid is the pentagonal prism, with 7 faces: 5 rectangular faces and 2 pentagons.

So x = 2 + 5 = 7

Therefore 2x = 2 * 7 = 14

Answer 2

The value of 2x will be "14".

Step-by-step explanation:

• However it's facial expression-transitive, that's not a Platonic hard material, because certain vertexes having 4 faces seemed to have 5 faces.  

• The pentagonal bi-pyramide,

⇒  dt{2,5}

• could be abbreviated,

⇒  trdt{2,5}.  

Now,

⇒  $x=2+5$

       $=7$

So,

⇒  $2x=2\times 7$

         $=14$

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