diff --git a/web/app/sketcher/constr/ANConstraints.js b/web/app/sketcher/constr/ANConstraints.js
index 596f0603..85f502fe 100644
--- a/web/app/sketcher/constr/ANConstraints.js
+++ b/web/app/sketcher/constr/ANConstraints.js
@@ -320,7 +320,7 @@ export const ConstraintDefinitions = {
           const a1 = segment1.params.ang.get();
           const a2 = segment2.params.ang.get();
           const ang = makeAngle0_360(a2 - a1);
-          return Math.abs(180 - ang) > Math.min(Math.abs(360 - ang), Math.abs(0 - ang)) ? 0 : 180;
+          return Math.abs(180 - ang) > Math.min(Math.abs(360 - ang), Math.abs(0 - ang)) ? 180 : 0;
         },
         transform: degree => degree * DEG_RAD
       }
diff --git a/web/app/sketcher/tools/fillet.js b/web/app/sketcher/tools/fillet.js
index cec74c52..f36e6a4c 100644
--- a/web/app/sketcher/tools/fillet.js
+++ b/web/app/sketcher/tools/fillet.js
@@ -69,8 +69,8 @@ export class FilletTool extends Tool {
     const s1 = point1.parent;
     const s2 = point2.parent;
 
-    const inverted1 = Math.cos(s1.ang) * arc.c.x + Math.sin(s1.ang) * arc.c.y < s1.w;
-    const inverted2 = Math.cos(s2.ang) * arc.c.x + Math.sin(s2.ang) * arc.c.y < s2.w;
+    const inverted1 = s1.nx * arc.c.x + s1.ny * arc.c.y < s1.w;
+    const inverted2 = s2.nx * arc.c.x + s2.ny * arc.c.y < s2.w;
     arc.stabilize(this.viewer);
 
     pm.add(new AlgNumConstraint(ConstraintDefinitions.Fillet, [point1.parent, point2.parent, arc], {