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384 = 1/3.s^2.8
384.3 = s^2.8
1152 = s^2.8
s^2 = 1152/8 = 144
s = akar 144
s = 12 cm
cari tinggi segitiga pake pythagoras. 6(setengah rusuk alas),8(tinggi limas),10(tinggi segitiga)
L = La+jumlah Lsegitiga
= (12.12) + (4.1/2.12.10)
= 144 + 240 = 384 cm^2 (d)
*cek lagi ya*