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✨ Jawaban Terbaik ✨

bc長=ab長*sin58=30*0.848=25.44
dc長+bc長=最大高度=25.44+2=27.44

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a^2 + b^2 - 2abcos = c^2
500^2 + 300^2 - 2*500*300*(-1/2) =490000
c^2 = 490000
c = 700

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