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Attachment 2617 ¨Ðä´éà»ç¹$169=h^2+x^2$ ..........1(ÊÁ¡Ò÷Õè1) $(14-x)^2+h^2=15$.......2(ÊÁ¡Ò÷Õè2) $196-28x+x^2+h^2=225$ á·¹¤èÒ $h^2$ $196-225+x^2+169-x^2=28x$ $x^2$ËÒÂä» $140=28X$ $x=5$ á·¹¤èÒ$x$=5ŧã¹ÊÁ¡Ò÷Õè1 ä´é$h^2=169-25$ $h^2=144$ $h=\sqrt{144}$ $h=12$ ´Ñ§¹Ñ鹤ÇÒÁÊÙ§¢Í§ÊÕèàËÅÕèÂÁ¤Ò§ËÁÙ 12 «.Á. ÊÙµÃÊÕèàËÅÕèÂÁ¤Ò§ËÁÙ$\frac{1}{2}$ ¤Ù³ ¼ÅºÇ¡àÊé¹¢¹Ò¹ ¤Ù³ ÊÙ§ µÍºÁÕ¾×é¹·Õè 216 µÃ.«Á.:great::great: |
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Attachment 2619:great::great: |
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Attachment 2629:great::great: |
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