Prealgebra- Arc Length
Finding arc length of a circle. A great introduction to pre-algebra. Learn some basic math's through this simple tutorial.
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Step 1:
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The Formula
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In this problem we are going to find the length of the red arc. In order to do that we are going to use the formula that tells us to take the measure of arc AB, over 360, times by 2 Pi (Symbol)r. If you'll recall 2 pi r is the circumference of the circle.
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Step 2:
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Circumference
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So what we are actually doing is taking a fraction of the circumference of the circle. In this circle a few things were given is the radius, which is 14 centimeters,and the measure of the portion of the circle which is not highlighted in the red. That's going to be 30 degrees.
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Step 3: