WinegardDS2000A Universal 22-inch Mount for Off-Air TV Antennas

Q: When mounted vertically to the side of a building, how far away would the antenna pole be from the building if it were perfectly level vertically?

My rough estimates are that the angle is a 45 degrees (I literally overlapped some paper onto my screen to get a sketch of the mount), and that if there are 32" going out before up, then the horizontal offset from the building will be about 22". I personally need to clear about an 18-19" eave, so I was hoping this would do it.