作业帮the figure,AEC and BED are straight lines.If the area of △ABE is 4 cm^2 and the .in the figure,AEC and BED are straight lines.If the area of △ABE is 4 cm^2 and the area of △BCE is 6cm^2 , find the area of △CDE. 求解
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the figure,AEC and BED are straight lines.If the area of △ABE is 4 cm^2 and the .in the figure,AEC and BED are straight lines.If the area of △ABE is 4 cm^2 and the area of △BCE is 6cm^2 , find the area of △CDE. 求解
the figure,AEC and BED are straight lines.If the area of △ABE is 4 cm^2 and the .
in the figure,AEC and BED are straight lines.If the area of △ABE is 4 cm^2 and the area of △BCE is 6cm^2 , find the area of △CDE. 求解
the figure,AEC and BED are straight lines.If the area of △ABE is 4 cm^2 and the .in the figure,AEC and BED are straight lines.If the area of △ABE is 4 cm^2 and the area of △BCE is 6cm^2 , find the area of △CDE. 求解
9
用相似AE:EC=2:3,平行,所以BE:ED也是2:3面积比就是4:9