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緹 /Ptolemy's Theorem
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Posted at 2011-12-02 09:33:44 by л View
8426
<P align=left><IMG src="/shop/lib/meditor/../../data/editor/1323249621.JPG"> </P> <P align=left><FONT size=2 face=Tahoma>緹 , 簢 ABCD , <IMG src="/shop/lib/meditor/../../data/editor/1323249253.JPG"> ϸ, ϻ簢 ABCD 谡 ϸ, 簢 Ѵٰ ϴ ̴. </FONT></P> <P align=left><FONT size=2 face=Tahoma>ٽ ϸ ac + bd = ef ϴ ̴.</FONT></P> <P align=left><FONT size=2 face=Tahoma> 2ڻ Ģ, ﰢԼ ϴµ ϱ ϸ 簢 簢 Ÿ Ǵ ִ. </FONT></P> <P align=left><FONT size=2 face=Tahoma> ø Ȯ .</FONT></P> <P><FONT size=2 face=Tahoma>[1]</FONT></P> <P align=left><FONT size=2 face=Tahoma>ȸ̵ ﰢ ̿Ͽ Ѵ.</FONT></P> <P><FONT size=2 face=Tahoma><IMG src="/shop/lib/meditor/../../data/editor/1323249727.JPG"></FONT></P> <P><FONT size=2 face=Tahoma> ٿ <EM></EM> ǥõ ΰ ְ . ΰ <EM></EM> .</FONT></P> <P><FONT size=2 face=Tahoma><IMG src="/shop/lib/meditor/../../data/editor/1323249820.JPG"></FONT></P> <P><FONT size=2 face=Tahoma> ﰢ ABC A ߽ <EM></EM>ŭ ȸ̵ Ÿ ̴. </FONT></P> <P><FONT size=2 face=Tahoma> ̰ f<EM> </EM> 밢 AC ̰ c AD ̰ ȴ. </FONT></P> <P><FONT size=2 face=Tahoma>̶, ȸ AB 밢 BD P ǰ, P Ͽ 밢 CA ̰ x, y<EM> </EM> ȴ. </FONT></P> <P><FONT size=2 face=Tahoma>ﰢ ADP ﰢ ACB ϴ ũⰡ Ƿ ̴.</FONT></P> <P><FONT face=Tahoma><FONT size=2> y:c=a:f </FONT></FONT></P> <P><FONT face=Tahoma><FONT size=2>, ac=yf</FONT></FONT></P> <P><FONT size=2 face=Tahoma><IMG src="/shop/lib/meditor/../../data/editor/1323249906.JPG"></FONT></P> <P><FONT size=2 face=Tahoma> ǥõ ȣ AD ְ̹Ƿ ũ . ﰢ ACD A ߽ 밢 AC AB ֵ ȸ̵ ̴. , ﰢ ABP ﰢ ACD ϴ ũⰡ Ƿ ̴.</FONT></P> <P><FONT size=2 face=Tahoma> x:d=b:f</FONT></P> <P><FONT size=2 face=Tahoma>, bd = xf </FONT></P> <P><FONT size=2 face=Tahoma> ac + bd= yf + xf = ( x + y ) f = ef</FONT></P> <P><FONT size=2 face=Tahoma>[2]</FONT></P> <P><FONT size=2 face=Tahoma><IMG src="/shop/lib/meditor/../../data/editor/1323249964.JPG"><IMG src="/shop/lib/meditor/../../data/editor/1323250054.JPG"></FONT></P>
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