Part B: Using Angular Size to Determine Distance This section will utilize the same spreadsheet linked in the previous part of the lab. NOTE: You will need to convert your angular size from milliradians to radians by dividing by 1000 milliradians/radians. For example, an angular size of 1.045 milliradians would convert to 0.001045 radians or 1.045 x 10-3 radians