pentagon
Sign in to saveIn geometry, a pentagon () is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°.
AI overview
A pentagon is a five-sided shape with five angles. The interior angles of a pentagon always add up to 540 degrees, which is a useful property when working with geometry.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Polygon.name
- Pentagon
- Polygon.image
- 5-gon cyclic 01.svg
- Polygon.caption
- A cyclic pentagon
- Polygon.edges
- 5
via Wikipedia infobox
Article
26 sectionsContents
- Regular pentagons
- Derivation of the area formula
- Inradius
- Chords from the circumscribed circle to the vertices
- Point in plane
- Geometrical constructions
- Richmond's method
- Carlyle circles
- Using trigonometry
- Euclid's method
- Physical construction methods
- Symmetry
- Regular pentagram
- Equilateral pentagons
- Cyclic pentagons
- General convex pentagons
- Pentagons in tiling
- Pentagons in polyhedra
- Pentagons in nature
- Plants
- Animals
- Minerals
- Other examples
- See also
- In-line notes and references
- External links
In geometry, a pentagon () is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°.
A pentagon may be simple or self-intersecting. A self-intersecting regular pentagon (or star pentagon) is called a pentagram.