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Verified answer
Luas layang- layang = 810 cm²Diagonal 1 = 45 cm
Luas layang- layang = × diagonal 1 × diagonal 2
810 cm² = × 45 cm × diagonal 2
810 cm² = 22,5 cm × diagonal 2
diagonal 2 = 810 cm² ÷ 22,5 cm
diagonal 2 = 36 cm