@unknownuser said:
I am given the inside dimension, the arc height, the inner radius and the width (in this case, 44.25, 7.25, 37.77 and π although in this instance it didn't quite work out that way.
Thats because you have to use the inside dimension and height and calculate the inner radius or use the inner radius and calculate the inside dimension. So I guess the question is which one of these is the most important.
The model referenced below shows the differences between the Arches using either the radius or the chord length.
Arches by plugin
Arches generated by plugin