The names of the polygons in the plane.
Number of sides, the shape name, then the internal angle (=(180 - 360/number of sides)).

3: Triangle 60
4: Square 90
5: Pentagon 108
6: Hexagon 120
7: Heptagon 128.57..
8: Octagon 135
9: Nonagon aka enneagon 140
10: Decagon 144
11: hendecagon aka undecagon 147.27..
12: Dodecagon 160
13: triskaidecagon
14: tetrakaidecagon
15: pentakaidecagon
16: hexakaidecagon
17: heptakaidecagon
18: octakaidecagon
19: enneakaidecagon
20: icosagon
30: tricontagon
40: tetracontagon
50: pentacontagon
60: hexacontagon
70: heptacontagon
80: octacontagon
90: enneacontagon
100: Hectagon 176.4
1000: Chiliagon 179.64
10000: Myriagon 179.964
106: Megagon 179.99964
10100: Googolgon ~180

/msg me with more.