- Ryan Hirst
Suppose I say, "I walked from A to B along the arc of the circle with center O." Let us agree the arc was traversed from start to finish in a single direction. Given A, B, and O, Draw the arc. .... Go on. ....
It cannot be done. There are two choices. We can tell a little story in our heads where I can only walk in one direction, but that's pretend. Here is a better way: disambiguate. There are at least two ways: 1. Sign: "In what direction?" 2. Name a waypoint on the arc. I say, the arc is now uniquely determined. ____________ Measuring angles and arcs 1 of n