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m use lowercase pi |
→Arc length and area: : Changed the theta in the text to match with the theta in the formulae |
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Line 27:
:<math>s = {\theta}R</math>
The area ''a'' of the circular segment is equal to the area of the [[circular sector]] minus the area of the triangular portion (using the double angle formula to get an equation in terms of
:<math>a = \tfrac{R^2}{2} \left(\theta - \sin \theta\right)</math>
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