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48 = 4.s
s = 12 cm
dr ( diagonal ruang) = s
dr = 12 cm
4s = 48
s = 48/4
s = 12
pajang diagonal sisi = 12² + 12²
= 144 + 144
=288
=12 √2
panjang diagonal ruang = 12² + (12√2)²
=144 + 288
=432
=12√3
setau saya begitu, itu yang pakek cara pyhtagoras
tapi yang lebih simpel pakek rumus
s√3. tapi, hasilnya sama aja kok