# Category:Regular Icosahedra

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This category contains results about regular icosahedra.

A **regular icosahedron** is an icosahedron whose $20$ faces are all congruent equilateral triangles.

## Pages in category "Regular Icosahedra"

The following 11 pages are in this category, out of 11 total.

### C

### R

- Ratio of Lengths of Sides of Cube and Regular Icosahedron in Same Sphere
- Ratio of Sizes of Surfaces of Cube and Regular Icosahedron in Same Sphere
- Ratio of Sizes of Surfaces of Regular Dodecahedron and Regular Icosahedron in Same Sphere
- Ratio of Volumes of Regular Dodecahedron and Regular Icosahedron in Same Sphere
- Regular Dodecahedron is Dual of Regular Icosahedron
- Regular Icosahedron as Pentagonal Antiprism with Pyramidal Endcaps