<div><img onLoad='miniSelfResize(contents_14,this);' src="download.php?id=mathmovie&no=14&div=0&mode=1" border="0" /></div><br> <P><SPAN>ÆÛÁñ ¸ÂÃ߱⸦ ÅëÇØ »ï°¢ÇüÀÇ ¿Ü°¢ÀÇ Å©±âÀÇ ÇÕÀÌ 360µµ ÀÓÀ» ÇнÀÇÏ´Â ±³±¸ÀÌ´Ù.<BR><BR></SPAN><IFRAME height="315" src="http://www.youtube.com/embed/2e0kyDl3HrI" frameBorder="0" width="560" allowfullscreen=""></IFRAME> <P><SPAN></SPAN> </P> <P>»ï°¢ÇüÀÇ Á¾·ù´Â ¸Å¿ì ´Ù¾çÇÏ´Ù.</P> <P>¿ì¸®°¡ Àß ¾Æ´Â Á¤»ï°¢Çü, À̵»ï°¢ÇüÀ» ºñ·ÔÇÏ¿© °¢¾ç°¢»öÀÇ »ï°¢ÇüÀÌ ÀÖ°í,</P> <P>¾î¶² »ï°¢ÇüÀÌ¶óµµ ³»°¢ÀÇ Å©±âÀÇ ÇÕÀÌ 180<SPAN style="background: rgb(255, 255, 255); letter-spacing: 0pt; font-family: ÇÔÃÊ·Ò¹ÙÅÁ; mso-font-width: 100%; mso-text-raise: 0pt;" lang="EN-US">¡Æ <SPAN><FONT face="µ¸¿ò">¶ó´Â °ÍÀº ³Î¸® ¾Ë·ÁÁø »ç½ÇÀÌ´Ù.</FONT></SPAN></SPAN></P> <P><SPAN style="background: rgb(255, 255, 255); letter-spacing: 0pt; font-family: ÇÔÃÊ·Ò¹ÙÅÁ; mso-font-width: 100%; mso-text-raise: 0pt;" lang="EN-US"><SPAN><FONT face="µ¸¿ò">±×·¸´Ù¸é »ï°¢ÇüÀÇ ¿À±ãÀº ¾î¶³±î?</FONT></SPAN></SPAN></P> <P><SPAN style="background: rgb(255, 255, 255); letter-spacing: 0pt; font-family: ÇÔÃÊ·Ò¹ÙÅÁ; mso-font-width: 100%; mso-text-raise: 0pt;" lang="EN-US"><SPAN><FONT face="µ¸¿ò">±³±¸¿¡¼ »ï°¢ÇüÀÇ ¿Ü°¢À» ÇÑ °÷¿¡ ¸ð¾Æ º¸ÀÚ.</FONT></SPAN></SPAN></P> <P><SPAN style="background: rgb(255, 255, 255); letter-spacing: 0pt; font-family: ÇÔÃÊ·Ò¹ÙÅÁ; mso-font-width: 100%; mso-text-raise: 0pt;" lang="EN-US"><SPAN><FONT face="µ¸¿ò">³ë¶û, »¡°, ÆĶûÀ¸·Î Ç¥½ÃµÈ »ï°¢ÇüÀÇ ¿Ü°¢À» ÇÑ °÷¿¡ ¸ðÀ¸¸é ¹Ù·Î °¡ 360<SPAN style="background: rgb(255, 255, 255); letter-spacing: 0pt; font-family: ÇÔÃÊ·Ò¹ÙÅÁ; mso-font-width: 100%; mso-text-raise: 0pt;" lang="EN-US">¡Æ</SPAN>°¡ µÈ´Ù.</FONT></P></SPAN></SPAN> <P> </P> <P>The angle made with an extension of a side and its corresponding adjacent side is the exterior angle. </P> <P><SPAN class="main">Therefore, the sum of the interior angle and the exterior angle on a vertex is 180¡Æ. That is, an interior angle and an exterior angle are complementary.</SPAN> </P> <P class="main">Put the pieces of exterior angles of each vertex of the triangle into the right circle.</P> <P class="main">Now, guess the sum of the exterior angles of a triangle.</P>