Jawabanmu

2014-05-15T13:36:09+07:00
Misal rusuk kubus = a cm
Diagonal ruangnya a√3 cm = 11√3 cm berarti rusuk a= 11 cm

A.panjang rusuk kubus = 11 cm

B.luas alas PQRS = 11 x 11 = 121 cm²

C.luas permukaan kubus 6 x a x a = 6 (11x11) = 6x121 = 726 cm²

D.volume kubus
a x a x a = a³ = 11³ = 1331 cm³

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