19) Which compass can either be used as a hand instrument or can be fitted on a tripod?

20) Which compass graduated ring is attached with the needle?

21) What is the name of quadrant, if a line lies in between 90 Degree and 180 Degree?

22) What is the name of quadrant, if a line lies in between 180 Degree and 270 Degree?

23) What is the name the quadrant, if a line lies in between 270 Degree and 360 Degree?