Area of Intersecting Circles
Calculate area of intersecting circles
The area of intersecting circles can be calculated as
Thanks to Eric Eberly for providing this information.
If radii r_{1}, r_{2} and distance d between the centers are given  then the angles α_{1} and α_{2} can be calculated as
α_{1} = acos[(d^{2} + r_{1}^{2}  r_{2}^{2})/(2 d r_{1})]
α_{2} = acos[(d^{2} + r_{2}^{2}  r_{1}^{2})/(2 d r_{2})]
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