HELP PLZ! URGENT
2007-06-22 7:50 am
In a regular n-sideed polygon, the size of an interior angle is nine times that of an exterior angle. Find the value of n
回答 (2)
2007-06-22 7:54 am
✔ 最佳答案
size of an interior angle = (180)(9/10) = 162(n-2)(180)/n = 162
180n - 360 = 162n
n = 20
2007-06-22 11:45 am
(n-2)180 360
----------- = 9x------
n n
(n-2)180 = 9X360
n-2 = 18
n = 20
2007-06-22 03:47:05 補充：
size of an interior angle= (n-2)180--------------- nsize of an exterior angle= 360/n
----------- = 9x------
n n
(n-2)180 = 9X360
n-2 = 18
n = 20
2007-06-22 03:47:05 補充：
size of an interior angle= (n-2)180--------------- nsize of an exterior angle= 360/n
參考: me
收錄日期: 2021-04-13 17:27:00
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070621000051KK05355