Reshape the xy face of P₁ = (15/(2φ), 8/(√3φ), √3φ) into B₁ = (5, 4√3/φ², √3φ), keeping the full z-depth fixed and extruding the exact rectangle-to-rectangle face dissection.
xy
P₁ = (15/(2φ), 8/(√3φ), √3φ)
B₁ = (5, 4√3/φ², √3φ)
z