Exponentiation: Exponentiation refers to raising a base number or variable to an exponent. In this case, we're raising theta (the base) to the power of 2 (the exponent).
Variable: A variable is an unknown value that can change or vary in different situations. In our case, theta (θ) is our variable.
Coefficient: A coefficient is a number that multiplies a variable. In θ^2, there is an implicit coefficient of 1 since we don't explicitly see it written.