Answer:
1. Radius: 3 Diameter: 6 Circumference: 18.85 Area: 28.27
2. Radius: 6 Diameter: 12 Circumference: 37.7 Area: 113.1
3. Radius: 9 Diameter: 18 Circumference: 56.55 Area: 254.47
Step-by-step explanation:
Diameter is double the radius.
Circumference is: 2πr
Area is: πr²
