Answer:
Area:
OR

Circumference:
OR

Diameter: 12cm
Radius: 6 cm
Explanation:
- Area of a circle:

- Circumference of a circle:

- Diameter of a circle: 12 cm
- Radius of a circle: d/2 (12/2 = 6 cm)

Area of a circle:

OR
(either one is the answer)
Circumference of a circle:

OR
(either one is the answer)
Hope this helps!