Discuz Math Forum»Forum › Mathematics › High School › 是否存在有7条棱的简单多面体

Return to list New

View 1767|Reply 2

[几何] 是否存在有7条棱的简单多面体

[Copy link]

770 Threads	4692 Posts	310K Credits

Credits: 35048

Send PM

isee Posted 2018-3-7 20:55 |Read mode

RT。
PS：有且仅有7条棱。

Reply Edit

413 Threads	1431 Posts	110K Credits

Credits: 11100

Send PM

realnumber Posted 2018-3-7 21:33

baike.baidu.com/item/简单多面体/1384389?fr=aladdin
应该不会有
V+F=E+2=9,v>3,F>3
只需要讨论V=4,5,两种，都不符合

Reply Edit

770 Threads	4692 Posts	310K Credits

Credits: 35048

Send PM

Author| isee Posted 2018-3-11 23:26

回复 2# realnumber

就是想提下立几中的欧拉公式。。。。。。。

Reply Edit

Return to list New

Mobile version|Discuz Math Forum

2025-5-31 11:09 GMT+8

Powered by Discuz!

× Quick Reply To Top Edit