(6,-185°)

(-6,355°)

(-6,-5°)

67 degrees

Subtract 360 from the angle to get one of them:

(6, -185)

For the other two, add or subtract 180 to get the opposite point, then negate the radius to compensate. That produces:

(-6, -5) .... subtract 180 and negate r

(-6, 355) ... add 180 and negate r

That last one could also come from adding 360 to the angle of (-6, -5) above it.