Hello  I am a newbie here so I am afraid I will be asking quite a few questions over the next few weeks, please bear with me.
My first question concerns how to measure vertex angles 
What I want to be able to do is look at a vertex, sighting straight through the centre of the polyhedron, and then measure the angles of the edges radiating out from that vertex. Note that these angles are not the internal angles of the surrounding polygons, but the angles that would be measured if those edges were projected onto a plane normal to the line from the vertex to the centre of the polyhedron.
An example would be the truncated cuboctahedron where each vertex is surrounded by a square, hexagon, octagon. Obviously, the angles I am looking for are not 90deg, 120deg, 135deg ... but these angles projected onto the plane normal to the sight line from the vertex to the centre of the polyhedron, and they will of course be larger.
Thanks in anticipation.
John
How to measure Vertex Angles
 robertw
 Site Admin
 Posts: 527
 Joined: Thu Jan 10, 2008 6:47 am
 Location: Melbourne, Australia
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Re: How to measure Vertex Angles
Hi John,
Yep that can be done.
Measurement Mode could be used to measure angles more generally, but is a bit trickier to use, eg:
Yep that can be done.
 From the menu, enable "Display>Show Vertex Angles"
 Select a vertex (Either Shift+Leftclick, or doubleclick on a vertex)
Measurement Mode could be used to measure angles more generally, but is a bit trickier to use, eg:

 Posts: 4
 Joined: Thu Apr 16, 2020 11:17 am
Re: How to measure Vertex Angles
Hello Rob
That was quick, and so easy when you know how! I was expecting to have to measure individual angles, this give me the whole lot in one go ... perfect.
Now I have all the information to build a jig for cutting the compound mitres at the end of wooden edge sticks to create Leonardo models, all from one keyclick!
Thanks for that.
John
That was quick, and so easy when you know how! I was expecting to have to measure individual angles, this give me the whole lot in one go ... perfect.
Now I have all the information to build a jig for cutting the compound mitres at the end of wooden edge sticks to create Leonardo models, all from one keyclick!
Thanks for that.
John