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175 lines
6.4 KiB
HTML
175 lines
6.4 KiB
HTML
<!DOCTYPE html>
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<html lang="en"><!-- #BeginTemplate "/Templates/Main.dwt" --><!-- DW6 -->
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<!-- Mirrored from www.mathsisfun.com/geometry/perimeter.html by HTTrack Website Copier/3.x [XR&CO'2014], Sat, 29 Oct 2022 00:42:46 GMT -->
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<!-- #BeginEditable "doctitle" -->
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<title>Perimeter</title>
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<meta name="Description" content="Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.">
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<meta name="keywords" content="math, maths, mathematics, school, homework, education">
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</head>
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<body id="bodybg">
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<div id="stt"></div>
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<div id="adTop"></div>
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<header>
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<div id="hdr"></div>
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<div id="tran"></div>
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<div id="cookOK"></div>
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</header>
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<div class="mid">
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<nav>
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<div id="menuWide" class="menu"></div>
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<div id="logo"><a href="../index.html"><img src="../images/style/logo.svg" alt="Math is Fun"></a></div>
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</nav>
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<div id="extra"></div>
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<article id="content" role="main">
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<!-- #BeginEditable "Body" -->
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<h1 class="center">Perimeter</h1>
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<p>Perimeter is the distance around a two-dimensional shape.</p>
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<div class="example">
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<h3>Example: the perimeter of this rectangle is <b>7+3+7+3</b> = <b>20</b></h3>
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<p class="center"><img src="images/perimeter-rectangle.svg" alt="perimeter of rectangle" height="148" width="226"></p>
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</div>
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<div class="example">
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<h3>Example: the perimeter of this regular <a href="pentagon.html">pentagon</a> is:</h3>
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<p class="center"><img src="images/perimeter-pentagon.svg" alt="perimeter of pentagon" height="162" width="159"></p>
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<p class="center large"><b>3 + 3 + 3 + 3 + 3</b> = <b>5×3 = 15</b></p>
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</div>
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<p> </p>
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<table style="border: 0; margin:auto;">
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<tbody>
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<tr>
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<td>
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<p>The perimeter of a <a href="circle.html">circle</a> is called the circumference:</p>
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<p class="center larger">Circumference = 2<font face="Times New Roman, Times, serif" size="+1">π</font> × radius</p></td>
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<td> </td>
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<td><img src="images/circle.svg" alt="circle" height="231" width="220"></td>
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</tr>
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</tbody></table>
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<h2>Perimeter Formulas</h2>
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<div class="simple" style="">
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<table align="center">
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<tbody>
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<tr>
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<td style="text-align:center;"><img src="images/area/triangle-perim.svg" alt="Triangle" height="64" width="91"></td>
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<td style="text-align:center; width:20px;"> </td>
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<td style="text-align:center;"><a href="../triangle.html">Triangle</a><br>
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<span class="larger">Perimeter = a + b + c</span></td>
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</tr>
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<tr>
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<td style="text-align:center;"><img src="images/area/square-perim.svg" alt="Square" height="94" width="93"></td>
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<td style="text-align:center;"> </td>
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<td style="text-align:center;"><font color="Red"><a href="square.html">Square</a></font><br>
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<span class="larger">Perimeter = 4 × a</span><br>
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a = length of side</td>
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</tr>
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<tr>
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<td style="text-align:center;"><img src="images/area/rect-perim.svg" alt="Rectangle" height="69" width="107"></td>
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<td style="text-align:center;"> </td>
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<td style="text-align:center;"><font color="Red"><a href="rectangle.html">Rectangle</a></font><br>
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<span class="larger">Perimeter = 2 × (a + b)</span></td>
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</tr>
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<tr>
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<td style="text-align:center;"><img src="images/area/quad-perim.svg" alt="Parallelogram" height="80" width="97"></td>
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<td style="text-align:center;"> </td>
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<td style="text-align:center;"><font color="Red"><a href="../quadrilaterals.html">Quadrilateral</a></font><br>
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<span class="larger">Perimeter = a + b + c + d</span></td>
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</tr>
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<tr>
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<td style="text-align:center;"><img src="images/area/circle-perim.svg" alt="circle" height="73" width="73"></td>
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<td style="text-align:center;"> </td>
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<td style="text-align:center;"><font color="Red"><a href="circle.html">Circle</a></font><br>
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<span class="larger">Circumference = 2<font face="Times New Roman, Times, serif" size="+1">π</font>r</span><br>
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r = radius</td>
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</tr>
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<tr>
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<td style="text-align:center;"><img src="images/area/sector-perim.svg" alt="Sector" height="72" width="94"></td>
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<td style="text-align:center;"> </td>
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<td style="text-align:center;"><font color="Red"><a href="circle-sector-segment.html">Sector</a></font><br>
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<span class="larger">Perimeter = r(θ+2) </span><br>
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r = radius<br>
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θ = angle in <b>radians</b></td>
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</tr>
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<tr>
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<td style="text-align:center;"><img src="images/area/ellipse-perim.svg" alt="ellipse" height="58" width="101"></td>
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<td style="text-align:center;"> </td>
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<td style="text-align:center;"><font color="Red"><a href="ellipse.html">Ellipse</a></font><br>
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<span class="larger">Perimeter = <a href="ellipse-perimeter.html">very hard!</a></span></td>
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</tr>
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</tbody></table>
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</div>
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<h2>Try It Yourself</h2>
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<div class="script" style="height: 360px;">
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images/perimeter-ruler.js
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</div>
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<p> </p>
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<div class="questions">625,626,757,3225,758,759,760,3224,3226,3227</div>
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<div class="related">
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<a href="index.html">Geometry Index</a>
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</div>
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<!-- #EndEditable -->
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</article>
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<div id="adend" class="centerfull noprint"></div>
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<footer id="footer" class="centerfull noprint"></footer>
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<div id="copyrt">Copyright © 2022 Rod Pierce</div>
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</div>
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