Answer:
see explanation
Step-by-step explanation:
using the following formulae
circumference ( C) = πd ← d is the diameter and radius (r) = [tex]\frac{d}{2}[/tex]
(7)
given C = π , then d = 1 and r = 0.5
(8)
given C = 78.8 , then πd = 78.8 ( divide both sides by π )
d = [tex]\frac{78.8}{3.14}[/tex] = 25.10 and r = [tex]\frac{25.10}{2}[/tex] = 12.55
(9)
given d = 3.4 , then r = [tex]\frac{3.4}{2}[/tex] = 1.70 and
C = πd = 3.14 × 3.4 = 10.68
