Will the values described in each situation be rational or irrational?

Question

Select Rational or Irrational to describe each situation.I put "R" and "I" to represent the choices I choose.

the length of a rectangle with a rational area and irrational width
:R

the area of a circle with a rational radius
:R
the perimeter of a square with irrational side lengths
:I

the volume of a cube with rational side lengths
:R

Answer 1

R*I = I

π is irrational

I+I = I (usually)

R^3 = R so ok there