<div><img onLoad='miniSelfResize(contents_16,this);' src="download.php?id=mathmovie&no=16&div=0&mode=1" border="0" /></div><br> <P> <SPAN>퍼즐 맞추기를 통해 오각형의 외각의 크기의 합이 360도 임을 학습하는 교구이다.</SPAN></P> <P><SPAN></SPAN> </P><IFRAME height="315" src="http://www.youtube.com/embed/2e0kyDl3HrI" frameBorder="0" width="560" allowfullscreen=""></IFRAME> <P><SPAN></SPAN> </P><SPAN><!--StartFragment--> <P style="background: rgb(255, 255, 255); text-autospace: ; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;" class="0"><SPAN style="background: rgb(255, 255, 255); mso-fareast-font-family: 함초롬바탕;">오각형의 외각의 크기의 합은 몇 도가 될까</SPAN><SPAN style="background: rgb(255, 255, 255); letter-spacing: 0pt; font-family: 함초롬바탕; mso-font-width: 100%; mso-text-raise: 0pt;" lang="EN-US">?</SPAN></P> <P style="background: rgb(255, 255, 255); text-autospace: ; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;" class="0"><SPAN style="background: rgb(255, 255, 255); mso-fareast-font-family: 함초롬바탕;">오각형의 외각으르 나타내는 조각 5</SPAN><SPAN style="background: rgb(255, 255, 255); mso-fareast-font-family: 함초롬바탕;">개를 원 안에 넣어 보자</SPAN><SPAN style="background: rgb(255, 255, 255); letter-spacing: 0pt; font-family: 함초롬바탕; mso-font-width: 100%; mso-text-raise: 0pt;" lang="EN-US">.</SPAN></P> <P style="background: rgb(255, 255, 255); text-autospace: ; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;" class="0"><SPAN style="background: rgb(255, 255, 255); font-family: 함초롬바탕;" lang="EN-US"> </SPAN><SPAN style="background: rgb(255, 255, 255); mso-fareast-font-family: 함초롬바탕;">교구를 가지고 직접 조각들을 모아 보자</SPAN><SPAN style="background: rgb(255, 255, 255); letter-spacing: 0pt; font-family: 함초롬바탕; mso-font-width: 100%; mso-text-raise: 0pt;" lang="EN-US">.</SPAN></P></SPAN> <P><SPAN></SPAN> </P> <P><SPAN>The angle made with an extension of a side and its corresponding adjacent side is the exterior angle. </SPAN></P> <P><SPAN class="main">Therefore, the sum of the interior angle and the exterior angle on a vertex is 180°. That is, an interior angle and an exterior angle are complementary.</SPAN> </P> <P></P> <P class="main">Put the pieces of exterior angles of each vertex of the pentagon into the right circle.</P> <P></P> <P class="main">Now, guess the sum of the exterior angles of a pentagon.</P> <P></P> <P class="main">Regardless of the number of sides, the sum of the exterior angles of a polygon is always.</P>
