WHAT CAN MATH OR GEOMETRY TELL US?

ANOTHER EXAMPLE OF INVERSE AB=CD

AB LEG: 1224.15-1142.59=81.56
D: 1169.40(C)+81.56=1250.96 ( failed AB=CD)
GAP = 1250.96-1232.30= 18.66
INVERSE AB=CD
A1- AB LEG=1232.30-81.561150.74
MINUS THE GAP:
B1=1150.74-18.66=1132.08
It really touched!