I built some simple sawhorses with 2x4's but realized I hadn't cut the feet at angles parallel to the ground. I 3D printed these simple feet which press onto the 2x4's and are held in place with a screw.
Print them in 100% infill in PETG for the strongest solution.
The angle is 14.5 degrees, which matches sawhorses made with this bracket from Home Depot:
https://www.homedepot.ca/product/hdx-5-5-inch-galvanized-steel-compartment-sawhorse-brackets/1001018660
The author marked this model as their own original creation.