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Sonic Geometry: Difference between revisions
→Pentagon 540 Degrees
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A pentagon may be simple or self-intersecting. A self-intersecting regular pentagon (or star pentagon) is called a pentagram. A regular pentagon has five lines of reflectional symmetry, and rotational symmetry of order 5 (through 72°, 144°, 216° and 288°). The diagonals of a convex regular pentagon are in the golden ratio to its sides. <ref>[https://en.wikipedia.org/wiki/Pentagon Pentagon wiki]</ref> | A pentagon may be simple or self-intersecting. A self-intersecting regular pentagon (or star pentagon) is called a pentagram. A regular pentagon has five lines of reflectional symmetry, and rotational symmetry of order 5 (through 72°, 144°, 216° and 288°). The diagonals of a convex regular pentagon are in the golden ratio to its sides. <ref>[https://en.wikipedia.org/wiki/Pentagon Pentagon wiki]</ref> | ||
==Hexagon 720 Degrees== | |||
In geometry, a hexagon (from Greek ἕξ, hex, meaning "six", and γωνία, gonía, meaning "corner, angle") is a six-sided polygon or 6-gon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°. A regular hexagon has six rotational symmetries (rotational symmetry of order six) and six reflection symmetries (six lines of symmetry). <ref>[https://en.wikipedia.org/wiki/Hexagon Hexagon wiki]</ref> | |||
==Septagon 900 Degrees== | |||
[[File:Regular polygon 7 annotated.svg|Regular heptagon with annotation.]] | |||
Septagon A 7-sided polygon (a flat shape with straight sides). Also called Heptagon.In geometry, a heptagon is a seven-sided polygon or 7-gon. | |||
The heptagon is sometimes referred to as the septagon, using "sept-" (an elision of septua-, a Latin-derived numerical prefix, rather than hepta-, a Greek-derived numerical prefix; both are cognate) together with the Greek suffix "-agon" meaning angle.<ref>[https://en.wikipedia.org/wiki/Heptagon Heptagon wiki]</ref> | |||
==References== | ==References== | ||