Question

The formula for the area of a circle is A = r 2. Classify the area of a circle with a radius of 0.75 centimeters as either rational or irrational. rational irrational

Answer 1

The formula for a circle is actually $\pi$ r².

the answer would be 0.5625$\pi$, which is irrational.

Answer 2

So the formula for the area of a circle looks like this:
$A= r^{2}$
Let's plug in the values:
$A= 0.75^{2}$
Solve, and we are left with 0.5625

The answer is rational!