Octagon (EntityTopic, 12)
From Hi.gher. Space
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| - | <[#ontology [kind topic] [cats 2D Regular Flat Shape] [alt [[freebase:01tnyl]] [[wikipedia:Octagon]]]> | + | <[#ontology [kind topic] [cats 2D Regular Flat Shape] [alt [[freebase:01tnyl]] [[wikipedia:Octagon]]]]> |
{{STS Shape | {{STS Shape | ||
| name=Octagon | | name=Octagon | ||
Revision as of 18:55, 3 January 2012
Equations
- The area of a regular octagon with side length l is:
2(1 + √2) · l2
Dissection
The octagon of side 1 may be dissected into 8× isosceles triangle with sides {1,2×√(1+√2⁄2)}.
Use
Octagonal faces are found in these trishapes on FGwiki:
- Cubic truncate (6×, 63%)
- Octagonal prism (2×, 20%)
| Notable Dishapes | |
| Flat: | triangle • square • pentagon • hexagon • octagon • decagon |
| Curved: | circle |
