Answer:
Everything is squared.
9) 2π(6) = 37.699cm
10) 2π(9) = 56.548yd
11) 2π(9) = 56.548in
12) 2π(7) = 43.982m
13) 2π(11) = 69.115m
14) 2π(2) = 12.566ft
Explanation:
To find the circumference it's 2πr.
To find the radius, cut the diamter in half.
9) 2π(6) = 37.699cm
10) 2π(9) = 56.548yd
11) 2π(9) = 56.548in
12) 2π(7) = 43.982m
13) 2π(11) = 69.115m
14) 2π(2) = 12.566ft