[Geometri]
L1 = ½ × 10 cm × 7 cm
= 5 cm × 7 cm
= 35 cm²
L2 = ½ × 10 cm × 12 cm
= 5 cm × 12 cm
= 60 cm²
2L(arsir) = 60+ 35 - 55
2L(arsir) = 40 cm²
L arsir = 40/2
L arsir = 20 cm²
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[Geometri]
L1 = ½ × 10 cm × 7 cm
= 5 cm × 7 cm
= 35 cm²
L2 = ½ × 10 cm × 12 cm
= 5 cm × 12 cm
= 60 cm²
2L(arsir) = 60+ 35 - 55
2L(arsir) = 40 cm²
L arsir = 40/2
L arsir = 20 cm²