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a=17
D=30
Sabemos que a^2=(D/2)^2+(d/2)^2 entonces (d/2)^2=a^2-(D/2)^2,
d=2√(a^2-(D/2)^2)=2√((17)^2-(30/2)^2)=2√(64)=16, d=16
Sabemos que la fórmula del área del rombo es A=Dd/2, entonces
A=Dd/2=30(16)/2=240
La mitad del área del rombo es: 120