On 12/30/2020 11:43 AM, Dean Hoffman wrote:

My dad had a carpenter's tool to copy angles. No idea what it's
called.


Probably a sliding bevel.

https://cutthewood.com/diy/use-sliding-bevel

They're pretty simple. You can use a protractor to set a given angle but
a lot of times you don't really care how many degrees it is as long as
all the angles are the same.