tolong bantuin yaaa !!
Jawaban:
luas ABCD = 144 cm²
Luas persegi = s×s =s²
maka s²= 144 cm²
[tex]s = \sqrt{144} = 12[/tex]
a. Panjang rusuk kubus = 12
b. Panjang diagonal ruang kubus =
[tex]AG ^{2} = \sqrt{AC ^{2} + CG^{2} } \\ \: \: \: \: = \sqrt{( {12 \sqrt{2}) }^{2} + {12}^{2} } \\ \: \: = \sqrt{288 + 144} \\ = \sqrt{432} \: \: = 12\sqrt{3}[/tex]
c. Volume kubus = s×s×s
= 12×12×12 =1.728
d. luas permukaan = 6s²
= 6 ×12²
= 6×144 = 864 cm²
e. panjang semua rusuk = 12 ×12 = 144
[answer.2.content]
