由２個相同的半circle and 1個等腰三角形do的.
如果半circle 的周界is36cm,三角形的area is?
Please help me! Please.......................................................................
Who is Maths 天才？
2006-11-25 6:09 am
回答 (3)
2006-11-25 6:42 am
✔ 最佳答案
等腰三角形有冇資料先???我做到咁多:
2r+(1/2)(2x3.14xr)=36
2r+3.14r=36
r(2+3.14)=36
r=36/(2+3.14)
參考: own knowledge
2006-12-01 12:29 am
問o既又唔知問乜，頭兩個答o既又唔知答乜。
2006-11-25 6:35 am
Diameter = Side of Equilateral triangle
Diameter = 36/pi
Area of Equilateral triangle = {sqrt(3) /4 }x( side )^2 = {sqrt(3) /2 }x( 36/pi )^2 = apprx. 56.9
Diameter = 36/pi
Area of Equilateral triangle = {sqrt(3) /4 }x( side )^2 = {sqrt(3) /2 }x( 36/pi )^2 = apprx. 56.9
收錄日期: 2021-04-13 14:08:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061124000051KK04445