Question

please help me I can give you a brainlist ​

Answer 1

Step-by-step explanation:

calculate the diameter by 2radius,circumference by 2πr

Answer 2

Step-by-step explanation:

a). d=6

circumference=2πr= 2×π×3=18.84

b) r=4.5

circumference=2πr = 28.26

c). circumference = 2×π×r

176/2×π=r

r=276.32. d=552.64

d). r= 14

circumference = 2×π×r =88

e) d= 42

circumference= 2πr= 131.88

f)r=42

circumference=263.76

g) circumference=2πr

8.8 =2πr

8.8/2π=r

r=13.81. d=27.62