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ej0cl6
Home away from home



µù¥U¤é: 2005-03-03
µoªí¼Æ: 281
¡© ² ¡ª ªº ¬G ¶m

 ®üÀs¤½¦¡ªºµý©ú

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http://blog.pixnet.net/ej0cl6
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¡@¤j®a¥i¥H°ÑÆ[¬Ý¬Ý©O

 2005-07-14 13:49­Ó¤H¸ê®Æ«ô³Xºô¯¸
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 Re: ®üÀs¤½¦¡ªºµý©ú

µ¹­Ó´£¥Ü
(1)²¦¤ó©w²z
(2)¤T¨¤¨ç¼Æ
³o2ºØ±`¨£ªº¤èªk...
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^^

 2005-07-14 20:28
ej0cl6
Home away from home



µù¥U¤é: 2005-03-03
µoªí¼Æ: 281
¡© ² ¡ª ªº ¬G ¶m

 Re: ®üÀs¤½¦¡ªºµý©ú

«e­±§Ú·|°Õ...
¥i¬O¨ì¤T¨¤¨ç¼Æ¸û¤£·|¤F
ÁÙ¨S¾Ç¨ì= =
¤@©w­n¥Î¤T¨¤¨ç¼Æ¶Ü¡H


_________________

http://blog.pixnet.net/ej0cl6
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¡@¤j®a¥i¥H°ÑÆ[¬Ý¬Ý©O

 2005-07-14 20:55­Ó¤H¸ê®Æ«ô³Xºô¯¸
³X«È








 Re: ®üÀs¤½¦¡ªºµý©ú

¥i°Ñ¦Òhttp://www.mathland.idv.tw/cai/heron.html


gkw00824usa

 2005-07-17 23:44
krnpcs
Just popping in



µù¥U¤é: 2005-10-08
µoªí¼Æ: 10


 Re: ®üÀs¤½¦¡ªºµý©ú

http://www.htjh.tpc.edu.tw/math/LSC/%AE%FC%C0s%A4%BD%A6%A1.htm
¤§«eÅ¥¦Ñ®vÁ¿¹L

 2005-10-09 23:09­Ó¤H¸ê®Æ¶Ç°e Email µ¹ krnpcsmsnm
black
Just popping in



µù¥U¤é: 2007-01-14
µoªí¼Æ: 6


 Re: ®üÀs¤½¦¡ªºµý©ú

³]¤@¤T¨¤§Î¤TÃä¤À§O¬°a¡Ab¡Ac
¦bb¤W°µ¤@­Ó°ª¡A±Nb¤À³Î¬°x©Mb-x¡A°ª¬°h
a^2-x^2=c^2-(b-x)^2
a^2-x^2=c^2-(b^2-2bx+x^2)
a^2-x^2=c^2-b^2+2bx-x^2
2bx=a^2+b^2-c^2
x=a^2+b^2-c^2/2b......[1]

¤T¨¤§Î­±¿n=bh/2
¤T¨¤§Î­±¿nªº¥­¤è=b^2h^2/4
§Q¥Î²¦¤ó©w²z
¤T¨¤§Î­±¿nªº¥­¤è=b^2/4(a^2-x^2).........(±a¤J[1])
=b^2/4{a^2-[(a^2+b^2-c^2)^2/4b^2]}
=b^2/4{[4a^2b^2-(a^2+b^2-c^2)^2]/4b^2}
=[2ab^2-(a^2+b^2-c^2)^2]/16
=[(2ab+a^2+b^2-c^2)(2ab-a^2-b^2+c^2)]/16
=[(a+b)^2-c^2][c^2-(a-b)^2]/16
=[(a+b+c)(a+b-c)(c+a-b)(c-a+b)]/16
±a¤Js=(a+b+c)/2
=[2s(2s-2c)(2s-2b)(2s-2a)]/16
=s(s-a)(s-b)(s-c)
¤T¨¤§Î­±¿n=¡Ô[s(s-a)(s-b)(s-c)]

 2007-02-10 16:55­Ó¤H¸ê®Æ


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