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diff --git a/src/geometry.h b/src/geometry.h
index d19d48c..410c7e0 100644
--- a/src/geometry.h
+++ b/src/geometry.h
@@ -19,6 +19,8 @@ class Geometry
 		static int Intersects(Line *, Line *, double * tp = 0, double * up = 0);
 		static int Intersects(Line *, Dimension *, double * tp = 0, double * up = 0);
 		static int Intersects(Line * l, Circle * c, double * tp = 0, double * up = 0, double * vp = 0, double * wp = 0);
+		static int Intersects(Circle * c1, Circle * c2, double * tp = 0, double * up = 0, double * vp = 0, double * wp = 0, Point * p1 = 0, Point * p2 = 0);
+		static void FindAnglesForSides(double s1, double s2, double s3, double * a1, double * a2, double * a3);
 };
 
 #endif 	// __GEOMETRY_H__