since one ray is at the \\(50^{\\circ}\\)  mark, read the angle measurement value pointed by the other ray from the values in the outer ring and subtract  \\(50^{\\circ}\\) from that measurement

since one ray is already at the \\(0^{\\circ}\\) mark, look the angle measurement from values in the protractor by looking exactly where the other ray crosses the protractor

Observe the figure

since one ray is at the \\(50^{\\circ}\\) mark, read the angle measurement value pointed by the other ray from the values in the outer ring and subtract  \\(50^{\\circ}\\) from that measurement

since one ray is at the \\(120^{\\circ}\\)  mark, read the angle measurement value pointed by the other ray from the values in the outer ring and subtract \\(120^{\\circ}\\)   from that measurement

read the angle measurements pointed by both rays on the protractor for the values written on inner ring and subtract lower of the two measurement from the higher one.

read the angle measurements pointed by both rays on the protractor for the values written on inner ring and subtract lower of the two measurement from the higher one.

read the angle measurements pointed by both rays on the protractor for the values written on inner ring and subtract lower of the two measurement from the higher one.

since one ray is at the  \\(90^{\\circ}\\)mark, read the angle measurement value pointed by the other ray from the values in inner ring and subtract   \\(90^{\\circ}\\)  from that measurement

since one ray is already at the \\(0^{\\circ}\\) mark, look the angle measurement from values in the protractor by looking exactly where the other ray crosses the protractor