Respuesta :

biffyboffboof

Answer:

the area of a circle is pie*raduis^2 so since raduis is half of diamaer

7 = 28.27

8 = 63.62

9 = 113.1

Hope This Helps!!!
Answer:
1.a=3.14×6cm=18.84cmsquare
2.a = 3.14×9ft=28.26ftsquare
3.a=3.14×12in=37.68 in square