丰富多彩的正方形.pptx

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,2017/5/4,#,正方形图形变式训练,A,D,E,C,B,F,正方形,ABCD,1,、,EAF=90,求证,ADE,ABF,2,、,AE=AF,求证,EAF=90,3,、,DE=BF,求证,AEF,是等腰直角三角形,4,、,EAF=90,，,S,正,=16,求,S,四,AFCE,5,EAF=90,AB=4,求,S,四,AFCE,A,D,E,C,B,F,1,、,EAF=90=C=D,ABCF,AE=AF,求证,:,四,ABCD,为正方形,2,、,在上题条件下,S,四,AFCE=24,，求,S,正,3,、连接,AC,，在上题条件下求,AC,4,、,EAF=90=C,AE=AF,，,S,四,AFCE=24,求,AC,A,D,E,C,B,F,2,、,在上题条件下,S,四,ABCD=18,，求,DE,1,、,ADC=90,=,B,AD=DC,，,DE=4,求,S,四,ABCD,3,、,ADC=90,=,B,AB,2,+CD,2,=2AD,2,求证,AD=AC,。,当,DEAB,时，求证,DE=AE+BC,A,D,E,C,B,F,正方形,ABCD,1,、,EAF=45,求证,DF+BE=EF,2,、求证,S,AEF=S,ABE+S,ADF,G,A,D,E,C,B,F,1,、,Rt,ABC,沿,AC,翻折得到,ADC,，,EAF=1/2DAB,求证,DF+BE=EF,G,2,、,AB=AD,EAF=1/2DAB,猜想,B,与,D,满足什么条件时,DF+BE=EF,A,D,E,C,B,F,正方形,ABCD,，,AEF,为等边三角形,1,、,BE=DF;2,、,DAF=15;3,、,AC,垂直平分,EF;,4,、,DF+BE=EF,；,5,、,S,CEF=2S,ABE,G,H,A,D,E,C,B,F,EAF=45,AG,为,AEF,高，,Rt,AGF,沿,AF,翻,折得到,FDA,Rt,AGE,沿,AE,翻,折得到,BEA.,求证：四,ABCD,为正方形,若,GF=4,GE=6,，求,AG.,G,A,D,E,C,B,ADC=90,=,B,A=60,AB=4,BC=5,求求,S,四,ABCD,