好簡單的求多邊形邊數問題！！！！！！
if an exterior angle of a regular n-sided polygon is less than its interior angle by 120度，find the value of n?
（n不是等於6）
好簡單的求多邊形邊數問題！！！！！！
2008-01-07 2:09 am
回答 (2)
2008-01-07 2:22 am
✔ 最佳答案
let x degree be ab exterior angle(180 - x) - x = 120
x = 30
360 / n = x = 30
Thus, n = 12
2008-01-07 2:45 am
if an exterior angle of a regular n-sided polygon is less than its interior angle by 120度，find the value of n?
360/n>180(n-2)/n
360>180n-360
720>180n
6>n
THE VALUE OF n can be 3,4 or 5.
360/n>180(n-2)/n
360>180n-360
720>180n
6>n
THE VALUE OF n can be 3,4 or 5.
參考: MYSELF
收錄日期: 2021-04-29 18:13:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080106000051KK03291