若一正多邊形的每一個內角 是156,求其邊數
list埋式比我牙...thx^^
Maths
2009-09-01 2:21 am
回答 (3)
2009-09-01 3:03 am
✔ 最佳答案
設正多邊形有A條邊(A-2)180=156A
180A-360=156A
180A-156A=360
A=15
邊數15
2009-09-01 5:43 am
360/(180-156)
=360/24
=15
=360/24
=15
2009-09-01 3:06 am
let x be the side of 正多邊形...
(x-2)x180度
------------------ = 156度
x
180x-360 = 156x
24x = 360
x = 15
(x-2)x180度
------------------ = 156度
x
180x-360 = 156x
24x = 360
x = 15
收錄日期: 2021-04-25 22:25:42
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