On 2009-05-11, Chris Friesen wrote:

Pay $5 for a large Staedtler plastic drafting triangle. Very accurate,
quite inexpensive.

Now, this looks really handy:

http://tinyurl.com/tufo2

I had to find an inside angle and ended up using both my T-bevel and
protractor head on my combo square. This would do it, easily.

I think everyone should have a decent combination square set. The center
finder is reason enough.

http://tinyurl.com/qurmnw

nb