Respuesta :

FH = 2*JH = 2*4 = 8 cm
Area(EFJH) = FH²/2 = 8²/2 = 64/2 = 32 cm²

AC = 2*JC = 2*9 = 18 cm
Area(ABCD) = AC²/2 = 18²/2 = 324/2 = 162 cm²

Area of the shaded region = 162 - 32 = 130 cm²
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