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S(sisi) = 10√3 : √3
S= 10
Luas Permukaan .... 6 S² = 6x10² = 600cm..(D)
34. Vol bola = 4/3π r³
v0l 1/2 bola... 1/2x 4/3πr³ =144π
4/6 r³ = 144
r³ =6/4*144=216
r =6
Luas Permukaan...L = 4πr²
= 4 x 36 xπ
= 144π
Luas 1/2 Permukaan ... 144/2π = 72π....A