total ordinate length of both straight lines + arc length to
equal 8.8
as shown in this image is 7.81313. I can adjust manually, but was
curious as to how I could drive this with an equation. then I can
adjust the 3" line to say 3.50. the arc with remain a .50" radius
and the 4" line will adjust accordingly to maintain an overall
length of 8.80". This is a layout for some rubber material to find
where the end of the material will be if the supported or flat
portion has more or less support surface.
Clear as mud? Maybe an equation isn't they way to approach
this?
I'm a little unclear on what you're asking. Are you trying toset the distance between the endpoints of your sketch, or are youtrying to set the length of the line (as if the tangent arc wasstraightened out)? Maybe posting a pic would help.
You have to write the equation so that one of the dimensions is set as in:
total ordinate length of both straight lines + arc length to equal 8.8