3×3 vs 3×4 m.
Same ridge. Longer room.
An extra metre along the ridge increases ideal floor area by one third. It does not increase headroom or floor width.
Both examples use 3 m width across the ridge, equal A-frame slopes, ground-level edges and a 1 m ridge height. The 4 m dimension runs along the ridge. Calculated figures are rounded to two decimals.
| Quantity | 3×3 m | 3×4 m |
|---|---|---|
| Fabric area | 9.00 m² | 12.00 m² |
| Floor width | 2.24 m | 2.24 m |
| Ground footprint | 6.71 m² | 8.94 m² |
| Triangular volume | 3.35 m³ | 4.47 m³ |
| Roof slope | 41.81° | 41.81° |
What geometry leaves out
Fabric mass, attachment strength and packed bulk depend on the product. Sloping walls reduce sleeping room; sag and splashback reduce it further. These figures cannot determine occupancy or storm performance. Guyline requirements depend on anchor positions.
Try your dimensions ↗Source: direct Euclidean geometry. Inspect the equations.