Question

Calculate the diameter of circle j if the circumference is 100.48 cm. Part b calculate the circumference of circle j if the radius is 7 meteres ( I need this before tomorrow please help)

Answer 1

Circumference equation is: C=dπ
So rearrange the circumference equation to find the diameter.

C= circumference
d= diameter
π = 3.14159

d= 100.48cm/3.14159
d= 31.98380437931111
Round to 5 significant figures: 31.984cm

Part B: radius=7m
Circumference formula: C=2πr

C: circumference
π: 3.14
r: radius

C=2πr
C= 2(3.14)(7)
C= 43.96m