數學題(立體圖形)

V = 18
F = 10
According to Euler's Formula : V + F - E = 2
So no. of edge, E = V + F - 2 = 18 + 10 - 2 = 26

頂+面-菱=2

所以，18+10-2=26

26條菱
希望幫到你！

HI........here is the answer

頂:18

面:10

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And here is a formula:

v+f-e=2
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so...........

v=18, f=10

(18)+(10)-e=2
-e =-26
e=26
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The answer should be:

頂18面10的立體圖形,有26條菱.~~~~~~
^^^^^^^
Hope i can help you!