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9. 1/2 × (12 ×5) × 8 = 30 × 8 = 240 cm
10. L persegi panjang
14 × 14 = 196
L lingkaran
22/7 × 7 × 7 = 154
= 196 - 154 = 42 cm
= 30 cm x 8cm(tinggi prisma)
= 240 cm
No 10 = luas persegi= 14x14 = 196cm
luas kedua lingkaran = diameter = 14 jari-jari= 7cm
= 22/7x7x7x1/2x2
= 154 cm
Jadi...= 240-154 = 86 cm
yg no 10 itu yg diarsir kan?
oh iya , maaf ya kalo salah ^U^