Question
Two identical triangles, GHF and DEJ, overlap each other as shown. Given that GH = DE = 12 cm and HF = JE = 11 cm, what is the area of the figure that is unshaded?
3 m

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Two identical triangles, GHF and DEJ, overlap each other as shown. Given that GH = DE = 12 cm and HF = JE = 11 cm, what is the area of the figure that is unshaded?