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d1 x d2/2 = 180 cm²
d1 x 24/2 = 180 cm²
d1 x 12 = 180 cm²
d1 = 180/12
d1 = 15 cm
180 = 1/2 x 24 x d₂
180 = 12 x d₂
d₂ = 180 ÷ 12
d₂ = 15 cm
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