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Verified answer
Luas kertas = 80 x 125 = 10.000 cm²luas 8 layang -layang = 40 x 45 : 2 x 8 = 7200 cm²
sisa kertas = 10.000 cm² - 7200 cm² = 2.800 cm²
80 x 125=10000
10000-7200= 2800