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Luas = 20 cm x 12 cm
Luas = 240 cm²
Keliling = (2 x p) + (2 X l)
Keliling = (2 X 20 cm) + (2 X 12 cm)
Keliling = 40cm + 24 cm
Keliling = 64 cm
luas=240 cm2
keliling=2(p+l)
2(20+12)
52cm
keliling=52 cm
semoga membantu :)