请翻译As shown in the following diagram,the area of Triangle ABC is _数学解答

请翻译As shown in the following diagram,the area of Triangle ABC is 56 square ventimeters,which is two time of the area of Parallelopram DEFC.Then,how many square centimeters is the area of the shaded part?

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解答

原文中有个别字母打错,下面已经改过来了：As shown in the following diagram,the area of Triangle ABC is 56 square centimeters,which is two time of the area of Parallelogram DEFC.Then,how many square cent...