math-平截球體~求解!!(急!)

2014-08-29 4:01 am
1)求該平截球體的體積.(thx!)

(圖)
https://plus.google.com/u/0/photos/110126143171093787655/albums/6052584641287469825/6052584644219275570?pid=6052584644219275570&oid=110126143171093787655
更新1:

Link已更改~ https://plus.google.com/u/0/photos/110126143171093787655/albums/6052637880077091057

更新2:

@知足常樂(謝謝你的提醒!)

回答 (4)

2014-08-29 5:55 pm
係平截「頭」體,唔係平截「球」體﹗
2014-08-29 8:40 am
MC^2=VC^2 - VM^2=13^2 - 12^2=25
MC=5

ND/MC=VD/VC
ND/5=39/13
ND=15

VN^2=VD^2 - ND^2=39^2 - 15^2=1296
VN=36

平截球體的體積
=體積VBD - 體積VAC
=(1/3)π(15)^2 (36) - (1/3)π(5)^2 (12)
=2600π cm^3
2014-08-29 4:13 am
不能看圖。。。。。。。

2014-08-29 23:16:31 補充:
50418129 有見地!!!!!


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