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Test-Lidia
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<table style="background-color: #ffffcc; background-image: url('http://www.insmilaifontanals.cat/none'); color: #006600; border: 4px solid #003300; float: none; text-align: left; vertical-align: top; width: 609px; height: 141px;" border="4" frame="void" rules="none" align="center"> <tbody> <tr style="font-weight: bold;" align="center"> <td style="background-color: #003300; background-image: url('http://www.insmilaifontanals.cat/none'); color: #ff6600; vertical-align: top; border-style: none; width: 100%;" valign="top"><span style="font-size: large; color: #ffff99;">Equació de la circumferència</span></td> </tr> <tr style="font-weight: bold;"> <td valign="top" width="100%"> <p><span style="color: #003300; font-size: small;">L'equació d'una circumferència de centre C(a,b) i de radi r es calcula amb:</span></p> <div style="text-align: center;"><span style="font-size: large; color: #003300; font-family: arial,helvetica,sans-serif;">x<sup>2</sup> + y<sup>2</sup> - 2ax - 2by + a<sup>2</sup> + b<sup>2</sup> - r<sup>2 </sup>= 0</span></div> </td> </tr> <tr style="font-weight: bold;"> <td valign="top" width="100%"><span style="color: #003300;">A partir de l'equació de la circumferència podem deduir el centre (a,b) i el radi r, </span><br /><span style="color: #003300;">trobant "a" a partir de -2ax</span><br /><span style="color: #003300;">trobant "b" a partir de -2by</span><br /><span style="color: #003300;">i deduint "r" a partir de a<sup>2</sup> + b<sup>2</sup> -r<sup>2</sup></span></td> </tr> </tbody> </table>
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Thursday, 23 August 2018, 4:18 PM
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