(Line 5) South 88-58'-07" West 60.00 feet to the southeasterly terminus of a non-tangent curve concave to the southwest and having a radius of 13 feet, a radial of said curve to said terminus bears North 89-12'-27" East,
(Curve 6) northwesterly along said curve, through a central angle of 89-01'-07", an arc distance of 20.20.
(Line 7) North 89-48'-40" West 87.99 feet
My radius is given to from line 5 the central angle is given to me and putting that with the line seven chord direction I use n89-01-07w with my arc distance as 20.20.
If I cannot figure this out I may just "fudge" it using the line 7 chord direction for my chord direction in line 6.