Answer:
A. Circumference is 16
C. Diameter is 25.5
Step-by-step explanation:
circumference = 2πr
Diameter = r/2
A.
Diameter = 5 or radius = 5/2
Circumference = 2*3.14*5/2 = 15.7 or 16
C.
Circumference = 80 = 2πr
Radius = 12.74
Diameter = 2*radius = 25.48 or 25.5
