diff --git a/web/app/sketch/circle.js b/web/app/sketch/circle.js
index ec9e46d7..8bb69d74 100644
--- a/web/app/sketch/circle.js
+++ b/web/app/sketch/circle.js
@@ -57,10 +57,19 @@ TCAD.TWO.EditCircleTool.prototype.mousemove = function(e) {
     var p = this.viewer.screenToModel(e);
     var r = TCAD.math.distance(p.x, p.y, this.circle.c.x, this.circle.c.y);
     this.circle.r.set(r);
+    if (!e.shiftKey) {
+      this.solveRequest(2);
+    }
     this.viewer.refresh();
   }
 };
 
+TCAD.TWO.EditCircleTool.prototype.solveRequest = function(fineLevel) {
+  this.solver = this.viewer.parametricManager.prepare([this.circle.r]);
+  this.solver.solve(fineLevel);
+  this.solver.sync();
+};
+
 TCAD.TWO.EditCircleTool.prototype.mouseup = function(e) {
   if (this.circle == null) {
     var p = this.viewer.screenToModel(e);
@@ -70,6 +79,8 @@ TCAD.TWO.EditCircleTool.prototype.mouseup = function(e) {
     this.layer.objects.push(this.circle);
     this.viewer.refresh();
   } else {
+    this.solveRequest(0);
+    this.viewer.refresh();
     this.viewer.toolManager.releaseControl();
   }
 };