108 | Geometry: Octagon is an eight-sided polygon, October 8th, 2017

 Octagon is an eight-sided polygon.

Exterior Angles of 45°

https://www.mathsisfun.com/geometry/octagon.html
https://archive.fo/ur0lb

Oct is a prefix of the meaning eight.
Today's date is October 8^th, 10/8

10^th month on the 8^th day, 10/8, 108

Geometry = 108

 8 letters, 1 word, like 81.

Eighty one = 5+9+7+8+20+25 + 15+14+5 = 108

English Ordinal cipher and English Reduction cipher (Pythagorean Gematria) for those that are interested in spell checking the work.

 English Ordinal: A=1, B=2, C=3, D=4, E=5 etc.

English Reduction (Pythagorean Gematria: A=1, B=2, C=3, D=4, E=5, F=6, G=7, H=8, I=9

 (breakdown to single digit)

J=10=1+0=1

K=11=1+1=2

L=12=1+2=3

etc.

*Spell check, the word will always reduce to the same number in both English Ordinal and English Reduction (Pythagorean)

 4 + 0 = 4

 1 + 1 + 2 = 4

Math is great.

http://gematrinator.com/calculator/index.php