本人有兩題數學題不懂得作答，
是英文的數學題。
1. Each interior angle of a regular polygon is 108 degrees more than each exterior angle. How many sides are there in this polygon?
Answer: 10 sides.
最快答對者即送２０分。
最佳解答取20分：有關中二數學家課的問題
2007-02-21 3:01 am
回答 (3)
2007-02-21 3:06 am
✔ 最佳答案
let the exterior angle is x, then interior angle is x+108Since exterior angle +interior angle =180
x+x+108=180
2x=72
x=36
exterior angle is 36
Since Sum of all exterior angle =360
36n=360
n=10
There are 10 sides in this polygon
2007-02-21 3:38 am
x+x+108=180
2x=72
x=36
exterior angle is 36
Since Sum of all exterior angle =360
36n=360
n=10
There are 10 sides in this polygon
2x=72
x=36
exterior angle is 36
Since Sum of all exterior angle =360
36n=360
n=10
There are 10 sides in this polygon
2007-02-21 3:17 am
n: no. of sides
(n-2)x180` 360`
________=____+108`
n n
(n-2)x180` 360`+108`n
________=__________
n n
(n-2)x180`=360`+108`n
180`n-360`=360`+108`n
180`n-108`=720`
72`n=720`
n=10
(n-2)x180` 360`
________=____+108`
n n
(n-2)x180` 360`+108`n
________=__________
n n
(n-2)x180`=360`+108`n
180`n-360`=360`+108`n
180`n-108`=720`
72`n=720`
n=10
收錄日期: 2021-04-12 18:42:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070220000051KK03116