Circumference is pi times the diameter of your circle.
Area is pi times your radius squared.
1. Has a radius of 3 which means it has a diameter of 6 because diameter is twice your radius. Pi times 3 is about 9.43. Now for Area you will do your radius times itself which will give you 9, then multiply that by pi and you will get about 28.28
Using the same steps you should get
2: C: 15.71 A:19.64
3. C:62.85 A:314.28