Yes, easymike29 shows the way most people do it, that way you have two edges to use before having to sharpen again...
I must say though, that I use a different angle, maybe 3-5 degrees (85-87 degrees from the handle) and notice that the drawing shows much more bevel than what 88 degrees would really look like. A scraper with an angle like the drawing would be difficult to make cut in use.
Yes, Gene, there should be a radius in the cutting edges of the tool as seen in plan view. The radius changes depending on the work being done, and to some extent on preference and how the tool is held. A larger radius for rough scraping large flat surfaces, smaller radii for finishing, dovetails, etc.
