Panjang diagonal bidang sebuah kubus adalah √128 cm. Hitunglah: panjang rusuknya,

<p>Jawabannya adalah 8√2</p><p>&nbsp;</p><p>Ingat!</p><p>Diagonal bidang kubus = s√2</p><p>&nbsp;</p><p>Diketahui:</p><p>Diagonal bidang = √128</p><p>&nbsp;</p><p>Ditanya:</p><p>Panjang rusuk?</p><p>&nbsp;</p><p>Jawab</p><p>Diagonal bidang (sisi) = s√2<br>&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = √128<br>&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = √64 x √2<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 8√2</p><p>&nbsp;</p><p>Jadi, panjang rusuk kubus tersebut adalah 8√2 cm.</p>