TechDraw 3PtAngleDimension

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TechDraw 3PtAngleDimension.svg TechDraw 3PtAngleDimension

Menu location
TechDraw → Insert 3-Point Angle Dimension
Default shortcut
Introduced in version
See also
TechDraw AngleDimension


The 3-Point Angle Dimension tool adds a angular dimension to a View. The dimension may be specified by selecting three Vertices on a View. Note that the second of the three Vertices is the apex of the angle. The Angle3Pt will initially be the projected angle (ie as shown on the drawing), but this may be changed to the actual 3D distance using the TechDraw LinkDimension.svg TechDraw LinkDimension tool.

TechDraw Dimension Angle3Pt example.png

Measuring the angle between two straight lines using three vertices; the second vertex should be the apex of the angle


  1. Select the points or edge which define your measurement.
  2. Press the TechDraw 3PtAngleDimension.svg 3-Point Angle Dimension button
  3. A dimension will be added to the View. The dimension may be dragged to the desired position.
  4. If needed, add tolerances as described in this page.

To change the properties of a dimension object either double-clicking it in the drawing or in the Tree view. This will open the dimension dialog.


Dimension objects are vulnerable to the "topological naming problem". See TechDraw LengthDimension for more information.


See TechDraw LengthDimension.


See also: TechDraw API and FreeCAD Scripting Basics.

The 3-Point Angle Dimension tool can be used in macros and from the Python console by using the following functions:

dim1 = FreeCAD.ActiveDocument.addObject('TechDraw::DrawViewDimension','Dimension')
dim1.Type = "Angle3Pt"
dim1.References2D=[(view1, 'Vertex1',(view1, 'Vertex4'),(view1, 'Vertex2'))]
rc = page.addView(dim1)