一到希望杯试题 As shown in the figure 25,in△ABC we have AB=BC=CA,DF⊥AC,DE⊥AB.Please compare themagnitudes of the perimeter of △AEF and the perimeter of quadrilataral EBCF中文大意： 在正△ABC中 AB=BC=CA,BC上有一点D,DE⊥AB,

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一到希望杯试题Asshowninthefigure25,in△ABCwehaveAB=BC=CA,DF⊥AC,DE⊥AB.Pleasecomparethemagnitudesoftheperimete

一到希望杯试题 As shown in the figure 25,in△ABC we have AB=BC=CA,DF⊥AC,DE⊥AB.Please compare themagnitudes of the perimeter of △AEF and the perimeter of quadrilataral EBCF中文大意： 在正△ABC中 AB=BC=CA,BC上有一点D,DE⊥AB,
一到希望杯试题
As shown in the figure 25,in△ABC we have AB=BC=CA,DF⊥AC,DE⊥AB.Please compare themagnitudes of the perimeter of △AEF and the perimeter of quadrilataral EBCF
中文大意： 在正△ABC中 AB=BC=CA,BC上有一点D,DE⊥AB,DF⊥AC.试比较三角形AEF和四边形EBCF的周长

一到希望杯试题 As shown in the figure 25,in△ABC we have AB=BC=CA,DF⊥AC,DE⊥AB.Please compare themagnitudes of the perimeter of △AEF and the perimeter of quadrilataral EBCF中文大意： 在正△ABC中 AB=BC=CA,BC上有一点D,DE⊥AB,
因为AB=BC=CA,且ED⊥AB,DF⊥AC,则∠EDB=∠FDC=30°,所以BD=2BE,DC=2FC,则四边形BCFE=EF+BE+FC+BD+DC=3BE+3FC+EF,
而C△AEF=AE+EF+AF=AB-BE+AC-FC+EF=2BC-BE-FC+EF=2(BD+DC)-BE-FC+EF=3BE+3FC+EF.
所以三角形AEF和四边形EBCF的周长相等

一到希望杯试题 As shown in the figure 25,in△ABC we have AB=BC=CA,DF⊥AC,DE⊥AB.Please compare themagnitudes of the perimeter of △AEF and the perimeter of quadrilataral EBCF中文大意： 在正△ABC中 AB=BC=CA,BC上有一点D,DE⊥AB, as is shown in ?as is shown in请解释一下 as is shown,as shown,as it is shown in the picture.哪个对?为什么? AS SHOWN As is shown in the graph求中文意思 As is vividly shown in the Picture.翻译 as shown 的语法分析As shown in the diagram belowLay your frame in to your case as shown below如果as等于which,那也应该是 as is shown的呀 as is shown是什么意思 as shown in the picture...是不是as后面是不是有is? 英语翻译两个句子希望大家帮忙翻译,请手动翻译,不要选择金山快译.Proponents point to features such as the terraced “beaches” shown in one image,which could conceivably have been left behind as a lake or ocean evaporated a why a decrease in long-term assets is shown as an increase in cash flows 跪求希望杯初二数学竞赛试题第一届到第十九届第一试和第二试（完整版）一楼的打不开 2009年希望杯试题 2011希望杯复赛试题 2011希望杯六年级试题 求2011希望杯试题 希望杯试题及答案. 英语翻译Enter the letters shown in the image as they appear翻译成中文