Jawabanmu

2014-04-17T18:23:41+07:00
Pertama cari t
t²= diagonal ruang²-diagonal sisi²
=> 17²-(√(12²+9²))²
t²= 289-225= 64
t=√64=8
volume= p x l x t
volume= 12 x 9 x 8 =864cm³
sorry kalo itungannya salah, semoga bermanfaat
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2014-04-17T18:29:54+07:00
t²= diagonal ruang²-diagonal sisi²
=> 17²-(√(12²+9²))²
t²= 289-225= 64
t=√64=8
volume= p x l x t
volume= 12 x 9 x 8 =864cm³

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