Can you tell me how to proof the following fomulae:
1. volume of pyramid ------ 1/3 × A ×h
A = base area , h = height
2.volume of cone ---------- 1/3 ×π × r^2 × h
r = radius h = height
3.volume of sphere -------- 3/4 × π × r^3
r = radius
Thank you.
Proof
2009-03-13 4:10 am
回答 (2)
2009-03-13 8:17 am
✔ 最佳答案
1.The proof of the volume of pyramid (equal to proof the vol. of cone):
http://web.chsh.chc.edu.tw/bee/oldmath/flash/036.htm
3The proof of volume of sphere :
http://www.qc.edu.hk/math/Junior%20Secondary/Sphere.htm
2009-03-13 00:26:46 補充：
也可參考 :
http://hk.knowledge.yahoo.com/question/question?qid=7009012701126
2009-03-13 4:28 am
如果要詳盡地證明此公式，必須用到微積分
收錄日期: 2021-04-21 22:01:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090312000051KK01482