diff --git a/src/libs/vlayout/vabstractdetail.cpp b/src/libs/vlayout/vabstractdetail.cpp
index 0483d6a6b..dc13d85ee 100644
--- a/src/libs/vlayout/vabstractdetail.cpp
+++ b/src/libs/vlayout/vabstractdetail.cpp
@@ -508,29 +508,33 @@ QPointF VAbstractDetail::SingleParallelPoint(const QLineF &line, const qreal &an
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-qreal VAbstractDetail::SumTrapezoids(int n, QVector<qreal> x, QVector<qreal> y)
+qreal VAbstractDetail::SumTrapezoids(const QVector<QPointF> &points)
 {
     // Calculation a polygon area through the sum of the areas of trapezoids
     qreal s, res = 0;
+    const int n = points.size();
 
-    for (int i = 0; i < n; ++i)
+    if(n > 2)
     {
-        if (i == 0)
+        for (int i = 0; i < n; ++i)
         {
-            s = x.at(i)*(y.at(n-1) - y.at(i+1)); //if i == 0, then y[i-1] replace on y[n-1]
-            res += s;
-        }
-        else
-        {
-            if (i == n-1)
+            if (i == 0)
             {
-                s = x.at(i)*(y.at(i-1) - y.at(0)); // if i == n-1, then y[i+1] replace on y[0]
+                s = points.at(i).x()*(points.at(n-1).y() - points.at(i+1).y()); //if i == 0, then y[i-1] replace on y[n-1]
                 res += s;
             }
             else
             {
-                s = x.at(i)*(y.at(i-1) - y.at(i+1));
-                res += s;
+                if (i == n-1)
+                {
+                    s = points.at(i).x()*(points.at(i-1).y() - points.at(0).y()); // if i == n-1, then y[i+1] replace on y[0]
+                    res += s;
+                }
+                else
+                {
+                    s = points.at(i).x()*(points.at(i-1).y() - points.at(i+1).y());
+                    res += s;
+                }
             }
         }
     }
diff --git a/src/libs/vlayout/vabstractdetail.h b/src/libs/vlayout/vabstractdetail.h
index 67c147dc5..f8aad520a 100644
--- a/src/libs/vlayout/vabstractdetail.h
+++ b/src/libs/vlayout/vabstractdetail.h
@@ -65,7 +65,7 @@ public:
     void    setWidth(const qreal &value);
 
     static QVector<QPointF> Equidistant(const QVector<QPointF> &points, const EquidistantType &eqv, qreal width);
-    static qreal SumTrapezoids(int n,  QVector<qreal> x,  QVector<qreal> y);
+    static qreal SumTrapezoids(const QVector<QPointF> &points);
 
 
 protected:
diff --git a/src/libs/vlayout/vlayoutdetail.cpp b/src/libs/vlayout/vlayoutdetail.cpp
index 2b55a3c42..e04ca02c9 100644
--- a/src/libs/vlayout/vlayoutdetail.cpp
+++ b/src/libs/vlayout/vlayoutdetail.cpp
@@ -288,21 +288,10 @@ qint64 VLayoutDetail::Square() const
         return 0;
     }
 
-    const int n = d->layoutAllowence.count();
-    qint64 sq = 0;
+    const QVector<QPointF> points = d->layoutAllowence;
+    const qreal res = SumTrapezoids(points);
 
-    QVector<qreal> x;
-    QVector<qreal> y;
-
-    for (int i=0; i < n; ++i)
-    {
-        x.append(d->layoutAllowence.at(i).x());
-        y.append(d->layoutAllowence.at(i).y());
-    }
-
-    qreal res = this->SumTrapezoids(n, x, y);
-
-    sq = qFloor(qAbs(res/2.0));
+    const qint64 sq = qFloor(qAbs(res/2.0));
     return sq;
 }
 
diff --git a/src/libs/vtools/dialogs/tools/dialogdetail.cpp b/src/libs/vtools/dialogs/tools/dialogdetail.cpp
index 6e485fd44..939da6c5e 100644
--- a/src/libs/vtools/dialogs/tools/dialogdetail.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogdetail.cpp
@@ -463,11 +463,11 @@ bool DialogDetail::DetailIsValid() const
     QByteArray byteArray;
     QBuffer buffer(&byteArray);
     pixmap.save(&buffer, "PNG");
-    QString url = QString("<img src=\"data:image/png;base64,") + byteArray.toBase64() + "\"/>";
+    QString url = QString("<img src=\"data:image/png;base64,") + byteArray.toBase64() + "\"/>" + QString(" ");
 
     if (ui.listWidget->count() < 3)
     {
-        url += QString(" ") + tr("You need more points!");
+        url += tr("You need more points!");
         ui.helpLabel->setText(url);
         return false;
     }
@@ -475,13 +475,13 @@ bool DialogDetail::DetailIsValid() const
     {
         if(not DetailIsClockwise())
         {
-            url += QString(" ") +tr("You have to choose points in a clockwise direction!");
+            url += tr("You have to choose points in a clockwise direction!");
             ui.helpLabel->setText(url);
             return false;
         }
         if (FirstPointEqualLast())
         {
-            url += QString(" ") +tr("First point can not equal the last point!");
+            url += tr("First point can not equal the last point!");
             ui.helpLabel->setText(url);
             return false;
         }
@@ -494,7 +494,7 @@ bool DialogDetail::DetailIsValid() const
 
                 if (QString::compare(previousRow, nextRow) == 0)
                 {
-                    url += QString(" ") +tr("You have double points!");
+                    url += tr("You have double points!");
                     ui.helpLabel->setText(url);
                     return false;
                 }
@@ -528,28 +528,19 @@ bool DialogDetail::FirstPointEqualLast() const
 //---------------------------------------------------------------------------------------------------------------------
 bool DialogDetail::DetailIsClockwise() const
 {
-    VDetail detail;
     if(ui.listWidget->count() < 3)
     {
         return true;
     }
+    VDetail detail;
     for (qint32 i = 0; i < ui.listWidget->count(); ++i)
     {
         QListWidgetItem *item = ui.listWidget->item(i);
         detail.append( qvariant_cast<VNodeDetail>(item->data(Qt::UserRole)));
     }
-    QVector<QPointF> points = detail.ContourPoints(data);
+    const QVector<QPointF> points = detail.ContourPoints(data);
 
-    QVector<qreal> x;
-    QVector<qreal> y;
-    const int n = points.size();
-    for (int i=0; i < n; ++i)
-    {
-        x.append(points.at(i).x());
-        y.append(points.at(i).y());
-    }
-
-    qreal res = detail.SumTrapezoids(n, x, y);
+    const qreal res = VDetail::SumTrapezoids(points);
     if (res < 0)
     {
         return true;