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132 lines
4.4 KiB
HTML
132 lines
4.4 KiB
HTML
<!doctype html>
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<html lang="en">
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<!-- #BeginTemplate "/Templates/Main.dwt" --><!-- DW6 -->
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<!-- Mirrored from www.mathsisfun.com/geometry/resizing.html by HTTrack Website Copier/3.x [XR&CO'2014], Sat, 29 Oct 2022 00:43:40 GMT -->
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<head>
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<meta charset="UTF-8">
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<!-- #BeginEditable "doctitle" -->
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<title>Geometry Resizing</title>
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<meta name="description" content="Learn how to resize a shape so it gets bigger or smaller but all angles and relative sizes stay the same.">
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<!-- #EndEditable -->
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<meta name="keywords" content="math, maths, mathematics, school, homework, education">
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<link rel="preload" href="../main4.js" as="script">
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gtag('config', 'UA-29771508-1');
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</script>
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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="adHide"></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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<article id="content" role="main">
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<!-- #BeginEditable "Body" -->
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<h1 class="center">Resizing</h1>
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<p style="float:right; margin: 0 0 5px 10px;"><img src="images/resize2.jpg" alt="resize image" height="133" width="172" ></p>
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<p><br></p>
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<p class="center large">When you resize a shape it gets <span style="font-size:150%;">bigger</span> or <span style="font-size:60%;">smaller</span> ...</p>
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<p> </p>
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<p class="large">... but it still looks <i>similar:</i></p>
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<ul>
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<li>all angles stay the same</li>
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<li>relative sizes are the same (for example<br>
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the face and body are still in proportion)</li></ul>
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<p> </p>
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<div class="words">Here we call it <b>resizing</b>, but other people call it <b>dilation, contraction, compression, enlargement</b> or even <b>expansion</b>! Same idea, just different names.</div>
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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>To resize, just do this for <i>every</i> corner:</p>
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<ul>
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<li>draw a line from the central point to the corner</li>
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<li>increase (or decrease) the length of that line</li>
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<li>put a dot at the new point</li>
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</ul>
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<p>Then just connect the dots for the resized shape!</p></td>
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<td><img src="images/resize.svg" alt="resize triangle on graph" height="204" width="204" ></td>
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</tr>
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</tbody></table>
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<h2>Try It Yourself</h2>
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<p>Press "Play" button.</p>
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<ul>
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<li>If you want the shape to <b>double</b> in size use <b>2</b>,</li>
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<li>If you want to <b>halve</b> in size use <b>0.5</b>.</li>
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</ul><br>
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<div class="script" style="height: 500px;">
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images/resize.js
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</div>
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<p>Try placing the pin in different locations, too.</p>
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<p> </p>
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<div class="questions">5150, 5151, 845, 846, 2131, 2132, 3352, 3353, 3354, 3355</div>
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<div class="related">
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<a href="transformations.html">Transformations</a>
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<a href="rotation.html">Rotation</a>
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<a href="reflection.html">Reflection</a>
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<a href="translation.html">Translation</a>
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<a href="congruent.html">Congruent</a>
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<a href="similar.html">Similar</a>
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<a href="index.html">Geometry Index</a>
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</div>
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</article>
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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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