Question

The ratio of circumference to the diameter of a circle $\frac{c}{d}$ is represented by $\pi$. But we say that $\pi$ is an irrational number. Why?

Answer 1

$\pi =\frac{c}{d}$ is a rational number

When c & d both are rational numbers

But the c & d we calculated is not exactly a rational number and either c or d or both can be irrational numbers

Since quotient of rational and irrational number is an irrational number .

So $\pi$ is an irrational number