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128 lines
4.7 KiB
HTML
128 lines
4.7 KiB
HTML
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<h1 class="center">Clockwise and Counterclockwise</h1>
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<h2><span class="center">Clockwise</span></h2>
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<p><span class="center">Clockwise</span> means moving in the <b>direction of the hands on a clock</b>.</p>
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<p class="center"><img src="images/clockwise.svg" alt="clockwise vs counterclockwise " height="233" width="255"></p>
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images/clockwise.js?mode=anti
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</div>
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<p>Most screws and bolts are <b>tightened</b>, and faucets/taps are <b>closed</b>, by turning <b>clockwise</b>.</p>
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<p class="center"><img src="images/clockwise-closed.svg" alt="clockwise closed" height="197" width="195"></p>
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<h2><span class="center">Counterclockwise</span> / Anticlockwise</h2>
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<p>The opposite direction is called <span class="center"><b>counterclockwise</b></span> in the US, <b>anticlockwise</b> in the UK, or the less common but pretty cool <span class="module__title__link"><b>widdershins</b>!<br>
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</span></p>
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<h2>Angles</h2>
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<p>Angles from a line are measured c<span class="center">ounterclockwise </span>(and a negative angle goes clockwise):</p>
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<p class="center"><img src="images/positive-negative-angle.svg" alt="positive negative angle" height="126" width="285"></p>
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<p> </p>
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<p>BUT <a href="../measure/compass-north-south-east-west.html">compass bearings</a> are measured clockwise:</p>
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<p class="center"><img src="../measure/images/compass-bearing.svg" alt="compass bearing" height="220" width="219"><br>
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<b>Compass Bearings</b></p>
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<h2>So Which Way?</h2>
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<p>Clock hands go <b>clockwise</b>, taps are <b>closed clockwise</b>, screws are <b>tightened clockwise</b>, compass bearings go <b>clockwise</b>.</p>
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<p>But angles are measured <b>counterclockwise</b>.</p>
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<p>(And that is just how it is.)</p>
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<h2>Abbreviation</h2>
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<p><span class="center">Such long words deserve to be shortened. </span></p>
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<p><span class="center">So clockwise</span> can be shortened to <b>CW</b>.</p>
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<p>And counterclockwise to <b>CCW</b> (or maybe <b>ACW</b> for anticlockwise).</p>
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<p> </p>
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<p> </p>
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<div class="related">
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<a href="../angles.html">Angles</a>
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<a href="index.html">Geometry Index</a>
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