[Capital]

We need to find out the radius of this half arch? Can anyone explain how to figure this out???

 

[difalkner]

Welcome to the forum! I would just draw it in CorelDraw or Fusion 360 to determine the arc radius.

David

 

[old55]

Welcome to the forum @Capital

 

[Wildwood]

Welcome to the forum - for what it's worth, I did a quick mock-up in Sketchup, and came up with a radius of 93.311"
(I work in mm, so this was converted both ways, using 25.4 mm to 1")
No guarantees!

Rob

 

[ger21]

If you draw it full scale to get the chord length and height, it's a simple formula.

Radius of an Arc or Arch with calculator - Math Open Reference

www.mathopenref.com

 

[MEBCWD]

I get 102.79 using VCarve Pro. Using measurements from VCarve Pro in the calculator ger provided I get 102.81