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writes:

I need to figure out the taper angle on a piece of wood. Can someone
help me out?? The piece is 18 7/16" long. The top is 1 11/16" wide and
the bottom is 2 3/16" wide. What angle would I need to cut that?

IMHO, you can't get there from here by trying to adjust some cutting tool to
an angle guide.

Suggest the following:

1) Lay out the angle with a straight edge and a pencil.

2) Trim away any waste in excess of about 1/4"-1/2".

3) Clamp on a straight edge and clean up with a router and a pattern or
bottom bearing, trim bit.

(I do it both ways)

HTH

Lew