引用:
原帖由 wan19948 於 2012-2-5 07:23 發表 
應該用(N-2)X180條式搵左內角和先
(N=邊數)
之後再用最細既銳角(應該係89度
)
就搵到個答案
(唔洗四捨五入直接捨去)
睇完你個答案之後堅係笑左..等我黎啦
引用:
原帖由 囧-神 於 2012-2-4 19:03 發表 
我想知呢條點做
弟13條 plz~
suppose the polygon must be exist (assume that it is not complex)
note that ''pi=degree of 180''
the exterior angles sum of polygon = 2pi
the corresponding exterior angles of acute angle must be exceed pi/2
since the exterior angles sum of polygon must not be over 2pi
so that the maximum number of acute angles in a 2012-sided polygon is 3.
or
the number of acute angles in a 2012-sided polygon is 1007.(alt solve method without any assumption )
[
本帖最後由 ★前田敦子 於 2012-2-6 20:39 編輯 ]