First of all, you need this simple formula:

dome radius = strut length/strut factor

which is the same as:

strut length = dome radius * strut factor

Now all you need are the strut factors!

## Equations for Calculator

- Circumference = π 2r
- Area of a circle = π r
^{2} - Surface area of sphere = 4 π r
^{2} - volume of a sphere = (4/3) π r
^{3}

## Angles

The bending angles are as follows:

1v dome: bend 32º on each end

2v dome: bend A’s 18º, and B’s 16º on each end

3v dome: bend A’s 10º, B’s and C’s 12º on each end

4v dome: bend all struts 7º-9º on each end

5v dome: bend all struts 6º-7º on each end

6v dome: bend all struts 5º-6º on each end