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(Figure3)InatrapezoidABCD,AE=DE,CE⊥AD,CEisabisectorto∠BCD,thentheratiooftheareaofaquadrilateralABCEtothatofatriangleCDEis.(英汉小词典trapezoid:梯形;bisecto

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(Figure 3)In a trapezoid ABCD AE= DE , CE⊥AD , CE is a bisector to ∠BCD , then the ratio of the area of a quadrilateral ABCE to that of a triangle CDE is _____.

( 英汉小词典 trapezoid :梯形; bisector :平分线; ratio :比值; quadrilateral :四边形 )

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7:9