== == A 56 sided shape is called a Pentacontakaihexagon.
The equation for the total interior angles of a polygon is (n-2)x180. In this case, the shape has 56 sides. Thus, to work out the total interior angles of the shape you do: (56-2)x180 =54x180 =9,720. Therefore the total interior angles for a 56 sided shape is 9,720.
The name of a 51 sided polygon is Pentaconhenagon. The name of a 52 sided polygon is Pentacondigon. The name of a 53 sided polygon is Pentacontrigon. The name of a 54 sided polygon is Pentacontetragon. The name of a 55 sided polygon is Pentaconpentagon. The name of a 56 sided polygon is Pentaconheptagon. The name of a 57 sided polygon is Pentaconhexagon. The name of a 58 sided polygon is Pentaconoctagon. The name of a 59 sided polygon is Pentaconenneagon.
The name of a 56 sided polygon is Hexapentacontagon.
Every polygon known has a unique name. These names are created, usually based of the number of sides on the polygon. The pentacontakaihexagon is a polygon with 56 sides.
56-gon
The equation for the total interior angles of a polygon is (n-2)x180. In this case, the shape has 979 sides. Thus, to work out the total interior angles of the shape you do: (979-2)x180 =977x180 =175,860 Therefore the total interior angles for a 56 sided shape is 175,860.
56*(56-3)/2 which is 1484
A 45-sided shape is called a pentatetracontagon. But, actually, if you want to keep it simple, you can just append the suffix -gon to the end of a number (higher than 10 only), like 12-gon, or 56-gon, or 89-gon or 1,000,000,000-gon, et cetera.
There are: 0.5*(562-(3*56)) = 1484 diagonals
Octacontogon is its real name. But, really, for any shape with a side number higher than ten, you can just append the suffix -gon to the number, i.e. 12-gon, 56-gon, et cetera.
56