Sum of Interior Angles
<p><a href="https://www.prepswift.com/quizzes/quiz/prepswift-sum-of-interior-angles" target="_blank">Sum of Interior Angles Exercise</a></p><p>From the previous mountain entry, we know there are $180$ degrees in every triangle. We can use this fact to easily find the <strong><span style="color:#8e44ad;">Sum of Interior Angles</span></strong> of any polygon. We simply have to find the number of triangles in it. For example, notice how a rectangle can be separated into two triangles, a pentagon into three, and a hexagon into four. </p>
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<p>Do you see the pattern? Do you see it? A polygon with $4$ sides can be separated into $2$ triangles, a polygon with $5$ sides can be separated into $3$, and a polygon of $6$ sides can be separated into $4$. So, to find the sum of interior angles of a polygon of $n$ sides, simply use this formula:</p>
<p>$$(n-2) \times 180°$$</p>