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Question
Using Euler’s formula, find the unknowns.
| Faces | Verticles | Edges |
| 20 | 10 | ? |
Sum
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Solution
Euler’s formula is given by F + V – E = 2
F = 20, V = 10
By Euler’s formula = 20 + 10 – E = 2
30 – E = 2
E = 30 – 2
E = 28
Tabulating the required unknowns
| Faces | Verticles | Edges |
| 20 | 10 | 28 |
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Chapter 2: Measurements - Exercise 2.4 [Page 73]
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