On this simulator, the diameter of the called 'graduated disc' is divided in 360 spaces equidistants, called 'degrees', that are the 360 circular sectors of the 1° (one degree) each.
Turning the disc you will see the angle formed with une fixed line. In the top of teh disc there is a vernier or vernier. The 'zero' mark (0) of teh vernier mark the integer degrees of the angle. The vernier has twelve divisions that reffers to the sixty minutes (degrees division) that means that each mark 'mark' 5' (five minutes). The interpretation of teh vernier can be comprehended in the page: 'vernier: simulator of reading and interpretation: vernier scale in millimeter, tenth resolution - Metrology'.
Observe that the interpretation of the vernier in intuitive, We are familiar with teh called ' direct vernier ' (in this one the N graduations of teh vernier correspond to N-1 graduations in the main scale). The vernier of this simulator is the called 'retrograde vernier' (see that the N graduations of the vernier correspond to N+1 graduations of the main scale). This way, we must 'read' the mark following the same direction of the disc turning.
The mechanic of the utilization of the simulator of the goniometer of the end of teh page is: turn (drag and drop) the disc and investigate the reading of the degrees and of the minutes. One small icon (left in the screen) will help to see the angle formation.
Because of the limitations of the monitor resolution, some of the marks it can appear not aligned.
Beacuse of limitations of monitor resolution, some of the marks it can appear not aligned.