A regular octahedron is a solid with eight identical equilateral triangle faces — it looks like two square pyramids glued together at their bases, and it's the shape of many natural crystals (like fluorite) and the classic 8-sided gaming die.
A regular octahedron is a solid with eight identical equilateral triangle faces — it looks like two square pyramids glued together at their bases, and it's the shape of many natural crystals (like fluorite) and the classic 8-sided gaming die. This calculator finds the volume and surface area from a single edge length.
An octahedral crystal has an edge length of 4 cm. Volume = (√2/3) × 4³ ≈ 30.17 cm³. Surface Area = 2√3 × 4² ≈ 55.43 cm².
A 3D shape with 8 triangular faces, 6 vertices, and 12 edges — like two pyramids joined at their bases.
Volume = (√2/3) × edge length³.
In octahedral crystal structures and as an 8-sided die (d8) in gaming.