Divide the shapes, so you're left with a triangular prism, and a rectangular prism. Calculate the slope of the triangle as per usual.
The pitch of the roof.
One difference: An octahedron has 8 faces, a triangular prism has 5. An octahedron (="eight faces") is a regular high-symmetry solid with all the faces identical. A triangular prism has a triangular base, a triangular roof, and 3 rectangular sides (walls).
a roof
The roof of your House
It is most often expressed as a ratio of inches of rise per 12 inches of run. A roof slope that rises 4 inches for every 12 inches of run is a "4 in 12" slope, or 4/12 slope, or 4:12 slope.
A hip roof, or hipped roof, is a type of roof where all sides slope downwards to the walls, usually with a fairly gentle slope. A square hip roof is shaped like a pyramid. Hip roofs on rectangular houses will have two triangular sides and two trapezoidal ones. A hip roof on a rectangular plan has four faces.
What's the slope rocket surgeon?
One difference: An octahedron has 8 faces, a triangular prism has 5. An octahedron (="eight faces") is a regular high-symmetry solid with all the faces identical. A triangular prism has a triangular base, a triangular roof, and 3 rectangular sides (walls).
The pitch of the roof.
pitch
a roof
It depends on the pitch (the slope) of the roof.
Pitch
5 in 12
roof
nope! it's a prism
The roof of your House