Jawabanmu

2014-06-08T15:30:01+07:00
324 = 4x * 3x * x | 324 = 12x3 | x3 = √27 | x = 3cm.
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Panjang = 12cm , lebar = 9cm , tinggi = 3cm. ||
Luas permukaan = 2pl+2pt+2lt | Lp = (2*12*9)+(2*12*3)+(2*9*3) | Lp = 216+72+54 | Lp = 342 cm2
oke
mau tanya alas prisma segitiga berukuran 5cm.12cm.13cm.jika tinggi prisma 10cm.maka vol prisma
luas alas = 1/2*alas*tinggi | luas alas = 1/2 * 12 * 5 | La = 30cm2. || K = 5+12+13= 30 cm || v = (2*La)+(K*T) | v = (2*30)+(30*10) | v = 60+300 | v= 360cm3
keliling sisi2nya tinggal ditambahin aja..
ok
2014-06-08T15:39:12+07:00
Volume : p x l x t
324 = 4n × 3n × n
324 = 12n^3
n^3 = 27
n = 3

p: 4.3 = 12
l : 3.3 = 9
t : 1.3 = 3
LP : 2(12.9+ 9.3 + 12.3 )
342
s = 1/2*k | s = 1/2(12+16+20) → 12,16,20 (triple phytagoras) | s = 24cm || L = 1/2*16*12 | L = 96cm2 // jari2 lingkaran dalam = L/s | r = 96/24 | r = 4 cm
r = jari2 lingkaran dalam
ok mksih
taa
*yaa