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DiagonalSisi = 5√2 cm
Sisi = DiagonalSisi / √2
Sisi = 5 cm
LuasKubus
= 6s²
= 6 x 5²
= 6 x 25 = 150 cm² (D.)
2.
LuasBalok
= 2pl + 2pt + 2lt
= 2x20x10 + 2x20x15 + 2x10x15
= 400 + 600 + 300
= 1300 cm² (B.)
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