Question

How to find the exact answer of the area and circumference

I know how to find the approximate answer for both but i don’t know how to find the exact answer. Pi should be included in the exact fraction.
Can someone explain pls:)

Answer 1

`\pi \\` is irrational so any attempt to use 3.14... is never EXACT...

do not try to convert it ... if it asks for exact..

write 81
`\pi \\` or 9
`\pi \\` etc. don't put in 63.62 like answers

Explanation: