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Verified answer
Materi : Bangun RuangKelas : VI SD
Dik : d = 7m
Dit : luas permukaan 1/2 bola..?
Jwb
Lp = 1/2 x 4 x Π x r²
Lp = 1/2 x 4 x 22/7 x 7/2 x 7/2
Lp = 1/2 x 154
Lp = 77 m²
Jadi luas aluminium adalah 77 m²
Semoga membantu :)