+| Angle between two lines is seen as an angle between two vectors.
+| Each line is treated as a vector with start and end points equal to those of the line.
+
+To create an Angle constraint in the active Sketch:
+
+#. select in the Main Menu *Sketch - > Angle* item or
+#. click **Angle** button in Sketch toolbar:
+
+.. image:: images/angle_constr.png
+ :align: center
+
+.. centered::
+ **Angle** button
+
+Property panel:
+
+.. image:: images/Angle_panel.png
+ :align: center
+
+Input fields:
+
+- **Line 1** is the first line selected in the view;
+- **Line 2** is the second line selected in the view;
+- **Value** is an angle between the lines, can be modified to set the desirable value;
+- **Angle type** is a type of angle measurement:
+ .. image:: images/angle_direct.png
+ :align: left
+ **Direct** is the least angle between two lines;
+
+ .. image:: images/angle_complementary.png
+ :align: left
+ **Complementary** is 180°- Direct angle between two lines;
+
+ .. image:: images/angle_backward.png
+ :align: left
+ **Backward** is 360°- Direct angle between two lines.
+- **Text location** is the position of the angle value label relatively to the angle line (in the view):
+ .. image:: images/location_left.png
+ :align: left
+ **Left** inserts text to the left of the angle line;
+
+ .. image:: images/location_automatic.png
+ :align: left
+ **Automatic** inserts text it the middle of the angle line if it has enough length, otherwise - to the left;
+
+ .. image:: images/location_right.png
+ :align: left
+ **Right** inserts text to the right of the angle line.
+
+When both lines are selected, the angle value is displayed in the property panel and in the view.
+
+When creating the constraint, after selection of two lines at the first time:
+
+- drag the angle presentation in the view to the desired position and click once;
+- set desirable angle value in the input field in the view and press **Enter** or just press **Enter** to keep the current angle
+
+.. image:: images/Angle_field_view.png
+ :align: center