#The rectangle HDEG has the same area as the square ABFG.In addition, the lengths DE = 12 cm and GE
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is the area of the whole figure given?
oh wait I just realized ABFG is a square
Area HDEG = Area ABFG = 27 × 12 = 324
GF = sqrt(324) = 18
Area GFH = (1/2) × 18 × 12 = 108
Area ABFH = 324 - 108 = 216