In a protractor, the mid-point of 0-180 line is called the ______ of the protractor.

In a protractor, the mid-point of 0-180 line is called the ______ of t

1.	In a protractor, the mid-point of 0-180 line is called the ______ of the protractor.
A.	centre
B.	radius
C.	chord
D.	bisector
Answer» B. radius