Mystery of the number 9

“If you only knew the magnificence of the 3, 6 and 9, then you would have the key to the universe.”
― Nikola Tesla

Why there are 360 degrees in a circle?

Multiply any number by 9 and the numerical digits that make up the answer add to 9.

9 x 5 = 45
4 + 5 = 9

9 x 8 = 72
& + 2 = 9

9 x 111 = 999
9 + 9 + 9 = 27
2 + 7 = 9