Panjang diagonal ruang suatu balok yang berukuran 8cm x 6cm x 4cm adalah....... A. 2akar9 C. 2akar29 B. 4akar12 D. 4akar29

cari dulu diagonal sisi alas
[tex] x^{2} = 8^{2} + 6^{2} \\ = \sqrt{100} \\ =10cm [/tex]

cari diagonal ruang
[tex] x^{2} = 4^{2}+ 10^{2} \\ = \sqrt{116} \\ = \sqrt{4.29} \\ =2 \sqrt{29} [/tex]

2akar29 maap kalo salah~