The most frugal use of materials is to cut a 1x2 corner to corner and glue the sawn faces together. (See diagram.)  The angle is 41 degrees, set your band saw or table saw blade to 20.5degrees. This can also be cut from a 2x2 (or laminate two 3/4” stock) where you just cut two corners off your stock.

This is optional if you are doing stitch and glue. Duct tape the outside of the bow, and prop the hull up bow down to assist in applying the fillet of thickened epoxy and tape to the bow joint.