It will depend on the width and height of the tent. You could always use math to calculate it out but you will need tent measurements. Width at base, sidewall height, and total height at peak. Create yourself a scale endwall drawing and then measure your angles. The angle will vary, most wall tents I have been in all have had a 9' peak but they have been of varying widths, 10' on up to 16' wide. The peak angle gets larger and the sidewall angle gets smaller as the tents width increases.