Question

find area of the circle using 3 as pi​

Answer 1

$a = \pi \times {r}^{2} \\ a = 3 \times {r}^{2}$

Answer 2

Hey, welcome to Brainly! You need to attach a picture, for users to give you an answer (or give us the radius of the circle.) If you have the radius of the circle, multiply 3 by the radius square (πr^2)