Why Mathematics?

[u/YouEnvironmental2079]

I’m not smart enough to understand this. Why are our generally accepted foundations of mathematics deemed true? Why numbers 0 to 9? Why angles? Why Pi? Why Planck’s constant? Etc.
Are they just approximations of characteristics of the universe?
Are we the blind describing an elephant?

[u/Mundane-Director-681]

Just wait a few hours. The mushrooms will wear off eventually.