Concentric Circles
<p><a href="https://www.prepswift.com/quizzes/quiz/prepswift-concentric-circles" target="_blank">Concentric Circles Exercise</a></p><p>In terms of math concepts, they don't come much simpler than <strong><span style="color:#8e44ad;">Concentric Circles</span></strong>.</p>
<p style="margin-left: 40px;"><strong>Definition</strong>: Two (or more) circles who share the same center. They're very nice circles.</p>
<p><strong><span style="color:#27ae60;">For You Visual Learners</span></strong></p>
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<p><strong><span style="color:#27ae60;">We Can Get Colorful With It</span></strong></p>
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<p style="text-align: center;"><em>I dare you to stare at that for a minute straight.</em></p>
<p><strong><span style="color:#e74c3c;">Common Problem with Concentric Circles</span></strong></p>
<p>What is the area of the shaded region below?</p>
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<p>To solve, simply subtract the area of the smaller circle from the area of the larger:</p>
<p>$$\pi R^2 - \pi r^2$$</p>
<p>$$36\pi - 16\pi$$</p>
<p><strong><span style="color:#27ae60;">$$20\pi$$</span></strong></p>