How can we use irrational numbers in math if we don’t know the full number?

Question

How can we use irrational numbers in math if we don’t know the full number?

In: 232

Answer 1

we actually do. we just cant properly represent it in decimal form so we either terminate the number at some point (normally 2-3 decimals in) or just use the symbol. like take pi for example. its 3.14158926535 etc etc whatever. you cant respresent all of pi faithfully with decimals lol. so you just write the symbol, or use something like 3.14 instead