YLL討論網

#ed_op#DIV#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#因為#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#AB#ed_op#/SPAN#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#為外公切線#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#所以#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#AB=#ed_op#/SPAN#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#根號#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#[(R+r)^2-(R-r)^2]= #ed_op#/SPAN#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#根號#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#(4Rr)#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#AB^2=4Rr#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#連接#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#BC,AD#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#因為#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#AC#ed_op#/SPAN#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#垂直#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#BD#ed_op#/SPAN#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#於#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#P#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#所以#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#AD,BC#ed_op#/SPAN#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#分別為圓#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#O1,#ed_op#/SPAN#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#圓#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#O2#ed_op#/SPAN#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#的直徑#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#AC^2=AB^2+BC^2=#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#BD^2=AB^2+AD^2#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#AC^2+ BD^2=2* AB^2+(2r)^2+(2R)^2#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"#ed_cl##ed_op#SPAN lang=EN-US#ed_cl#AC^2+ BD^2=8Rr+4r^2+4R^2=(2R+2r)^2=EF^2#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#/DIV#ed_cl#

#ed_op#DIV#ed_cl#其他大大可以解解這題嗎???#ed_op#/DIV#ed_cl#

#ed_op#DIV#ed_cl#呃, 也許是吧... (介於是和不是的我......)#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#奇怪, 我竟然想不起來我是怎麼算的......#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#..................#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl#

#ed_op#DIV#ed_cl#不如你試下吧~~~~aa2191943，你是國中生??#ed_op#/DIV#ed_cl#

#ed_op#DIV#ed_cl#令 O#ed_op#SUB#ed_cl#1 #ed_op#/SUB#ed_cl#半徑 r#ed_op#SUB#ed_cl#1 #ed_op#/SUB#ed_cl#, O#ed_op#SUB#ed_cl#2 #ed_op#/SUB#ed_cl#半徑 r#ed_op#SUB#ed_cl#2#ed_op#/SUB#ed_cl# ,#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#再將 AC, BD, EF 表成 r#ed_op#SUB#ed_cl#1 #ed_op#/SUB#ed_cl#與 r#ed_op#SUB#ed_cl#2#ed_op#/SUB#ed_cl# 的函數即可#ed_op#/DIV#ed_cl#

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mso-bidi-font-family: 新細明體; mso-font-kerning: 0pt"#ed_cl#P#ed_op#/SPAN#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-family: 新細明體; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#點，#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US style="FONT-FAMILY: 新細明體; mso-bidi-font-family: 新細明體; mso-font-kerning: 0pt"#ed_cl#AB#ed_op#/SPAN#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-family: 新細明體; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#為兩圓的外公切線，#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US style="FONT-FAMILY: 新細明體; mso-bidi-font-family: 新細明體; mso-font-kerning: 0pt"#ed_cl#A#ed_op#/SPAN#ed_cl##ed_op#SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-family: 新細明體; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"#ed_cl#和#ed_op#/SPAN#ed_cl##ed_op#SPAN lang=EN-US style="FONT-FAMILY: 新細明體; mso-bidi-font-family: 新細明體; 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