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1/2 lingkaran = 77 dm2
segitiga = 21 dm2
luas total = 98 dm2
8.
kotak = 441 dm2
lingkaran = 346.5 dm2
luas diarsir = 94.5 dm2
9.
lingkaran 1 = 314 cm2
lingkaran 2 = 346.5 cm2
luas diarsir = 32.5 cm2
10.
17 cm x 14 cm = 238 cm2