To find the area of a circle, you can use the formula:
Area = π * r², where r is the radius of the circle.
Given that the radius is 9 cm:
Area = π * 9²
Area = π * 81
Area ≈ 254.5 cm² (rounded to the nearest 10th)
To find the circumference of a circle, you can use the formula:
Circumference = 2 * π * r, where r is the radius of the circle.
Given that the radius is 9 cm:
Circumference = 2 * π * 9
Circumference = 18π
Circumference ≈ 56.5 cm (rounded to the nearest 10th)
Therefore, the area of the circle is approximately 254.5 cm², and the circumference is approximately 56.5 cm when rounded to the nearest 10th.
