| Step 1 | Place the protractor so that the origin (small hole) is over the point M. |
| Step 2 | Rotate the protractor so that the base line is exactly along the line ML. |
| Step 3 | Using (in this case) the inner scale, find the angle desired - here 42°. |
| Step 4 | Make a mark at this angle, and remove the protractor |
| Step 5 | With a ruler, draw a line from M to the mark you just made. Label this point V. |
| Step 6 | Done. The line drawn makes an angle LMV with a measure of 42° |