How to calculate Length of one Chord and projection, given the quantity of chord segments, angle between them and total overall 5-chord segment length

[stresbiz]

All we know, is X2, QTY of Panels, B=3.25 and A (see below)

We need to calculate X1, Y, H

I have an issue with Y and H. Also, I understand, that the angle, I am using in he formulas is not 10 or 15 deg. See the comparison between Calculated values and CAD Drawings.