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 <question type="category"><category><text>1MA 05. RECTES EN EL PLA/1MA.05.2 //// i ┴</text></category></question>
 
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      <text>1MA.05.2.40DT PERPENDICULARITAT(VECTORS)</text>
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      <text><![CDATA[<div style="text-align: center; font-weight: bold; color: #006600;"><span style="font-size: large;"><br /><br /> </span>
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<div style="text-align: center;" align="justify"><span style="color: #ffff99;"><span style="font-size: large;">Condició de perpendicularitat amb <span class="nolink">vectors</span> <br /></span></span></div>
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<div align="justify"><span style="color: #003300;"><span style="font-weight: bold;"><span style="font-size: small;">2 <span class="nolink">rectes</span> són perpendiculars si, i només si, els seus <span class="nolink">vectors</span> directors són perpendiculars</span><span style="font-size: large;"><span style="font-size: small;">, </span></span></span></span><span style="color: #008000;"><span style="font-size: small; color: #003300;"><span style="font-weight: bold;">o sigui si </span></span><span style="font-weight: bold;"><span style="font-size: small; color: #003300;">el seu <span style="text-decoration: underline;"><span class="nolink">producte escalar és 0</span></span>:</span> <br /></span></span>
<div align="center"><span style="color: #ff0000;"><span style="font-size: medium;"><span style="font-weight: bold;">x</span></span><span style="font-size: medium;"><sub style="font-weight: bold; color: #ff3300;">1·</sub></span><span style="font-size: medium;"><span style="font-weight: bold;">x</span><sub style="font-weight: bold; color: #ff3300;">2</sub><span style="font-weight: bold;"> + y</span><sub style="font-weight: bold; color: #ff3300;">1·</sub><span style="font-weight: bold;">y</span></span><span style="font-size: medium;"><sub style="font-weight: bold; color: #ff3300;">2</sub></span><span style="font-size: medium;"><span style="font-weight: bold;"> = 0</span></span></span></div>
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<p><span style="font-size: large;"><span style="font-weight: bold; color: #ff6600;"> </span></span></p>]]></text>
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