Respuesta :

[tex]a = \pi \times {r}^{2} \\ a = 3 \times {r}^{2} [/tex]

Fooki

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)