User contributions
- 13:30, 31 August 2021 (diff | hist) . . (0) . . 2509: Useful Geometry Formulas (→Explanation: Having said I confuse these things (Talk page), I confused these things, and didn't even realise!)
- 13:05, 31 August 2021 (diff | hist) . . (+3) . . 2509: Useful Geometry Formulas (→Explanation: Without the θ-angle it does look like a standard cuboid with right-angles in all corners, drawn as an oblique axonometric projection, but this must mean that it is only so in the special case of θ=90°.)