a^2+b^2=c^2
c=radius
a=1/2 distance from start and end
b= the length perpendicular from the midpoint
translation on the points gets the radius point
then as you said plot cos sin angle radius
c=radius
a=1/2 distance from start and end
b= the length perpendicular from the midpoint
translation on the points gets the radius point
then as you said plot cos sin angle radius