diff --git a/ExtDimension.cpp b/ExtDimension.cpp
index c4d0c61..dd664ee 100644
--- a/ExtDimension.cpp
+++ b/ExtDimension.cpp
@@ -28,6 +28,7 @@
 #include "/EgtDev/Include/EgtNumUtils.h"
 #include "/EgtDev/Include/EGkCurve.h"
 #include <new>
+#include <algorithm>
 
 using namespace std ;
 
@@ -319,8 +320,23 @@ ExtDimension::SetAngularEx( const Point3d& ptV1, const Point3d& ptP1,
       dLenDir = m_vtDir.Len() ;
    }
   // assegno gli altri punti notevoli della quotatura
-   m_ptP1 = ptV1 - ( ptV1 - m_ptP6) * m_vtN * m_vtN ;
-   m_ptP2 = ptV2 - ( ptV2 - m_ptP6) * m_vtN * m_vtN ;
+  // se i ptV concidono con l'intersezione tra le linee le sposto leggermente verso l'altro punto di quel lato
+   Point3d ptV1New = ptV1 ;
+   Point3d ptV2New = ptV2 ;
+   if ( AreSamePointApprox( ptV1, ptV)) {
+      Vector3d vtDir1 ; Line1.GetStartDir( vtDir1) ;
+      double dLen ; Line1.GetLength( dLen) ;
+      dLen = max( min( 1., dLen/ 10), 0.01) ;
+      ptV1New = ptV1 + vtDir1 * dLen ;
+   }
+   if ( AreSamePointApprox( ptV2, ptV)) {
+      Vector3d vtDir2 ; Line2.GetStartDir( vtDir2) ;
+      double dLen ; Line2.GetLength( dLen) ;
+      dLen = max( min( 1., dLen/ 10), 0.01) ;
+      ptV2New = ptV2 + vtDir2 * dLen ;
+   }
+   m_ptP1 = ptV1New - ( ptV1New - m_ptP6) * m_vtN * m_vtN ;
+   m_ptP2 = ptV2New - ( ptV2New - m_ptP6) * m_vtN * m_vtN ;
    m_ptP5 = m_ptP6 + vtLine1 * dLenDir ;
    double dLen1 = Dist( m_ptP6, m_ptP1) ;
    m_ptP3 = m_ptP6 + vtLine1 * ( dLenDir + m_dExtLineLen * ( dLen1 < dLenDir ? 1 : -1)) ;