"K" math term

i need to find a math term that begins with the letter K without going into a concept higher than intermediate algebra

Kampyle of Eudoxus
Kappa Curve
Kaprekar Constant/Number
Kepler-Poinsot Solids
Kepler's Conjecture
Khintchine's constant
kings problem
kite
klein bottle
knight's problem
knot
Knuth's Up-arrow notation
Koch snowflake
kroneker, leopold

K-Theory.

But more seriously, "kite" or "koch snowflake" are your best bets assuming that by intermediate algebra you mean intermediate high school algebra. Kites are very boring, but Koch snowflakes are not exactly a household name.

Kronecker Delta Function

usually not introduced until college but even a middle schooler should understand it.

I wants lots and lots of some delectable pot!

Marijuana MUST be legalized.