Angle Specification

Ok this isn't a question about Solidworks, it relates to a tutorial in
Sketchup... but I can't find the answer on the net or in Engineering
books, so I'm thinking that it might be US terminology.
In the Sketcup tutorials they use "8:12" to specify an angle? What does
this mean? What is the angle in decimal?
I'm sure there is a very simple answer to this.
Reply to
Loading thread data ...
In article , will says...
That terminology is common in construction, especially in roofing where "8:12" would indicate the slope as 8 units "rise" in 12 units "run". 8/12 is the inverse tangent of the angle.
Art W.
Reply to
Art Woodbury

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.