1.圖中有幾多個三角形?
http://intranet.kitsam.edu.hk/it-school/homepage/200409103/math2.bmp
2. 「?」代表的數字?
http://intranet.kitsam.edu.hk/it-school/homepage/200409103/math.bmp
math 2問(急急急急)
2007-01-19 5:07 am
回答 (2)
2007-01-19 5:13 am
✔ 最佳答案
There are 10 triangles.The 5 triangles are at the edges and each one of them can combine with the middle polygon to form a new triangle.
The number is 2.
The sum of the two on the left X the sum of the two at the right
=the number at the middle.
By this theorem, the ? is 2 by subsitution.
2007-01-19 5:13 am
第一題係十個
第二題係3
2007-01-18 21:14:36 補充：
第二題係2唔好意思
第二題係3
2007-01-18 21:14:36 補充：
第二題係2唔好意思
收錄日期: 2021-04-13 15:24:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070118000051KK04100