The radius of a circle is 9 millimeters. What is the circle's area?
Use 3.14 for 𝜋.
The formula for the area of a circle is A = 𝜋r^2, where r is the radius.
Substituting 9 for r and 3.14 for 𝜋, we get:
A = 3.14 x 9^2
A = 3.14 x 81
A = 254.34
Therefore, the area of the circle is 254.34 square millimeters.
To find the area of a circle, you can use the formula:
𝐴𝑟𝑒𝑎 = 𝜋 × 𝑟²
where 𝜋 is approximately equal to 3.14, and 𝑟 is the radius of the circle.
Given that the radius of the circle is 9 millimeters, we can substitute the values into the formula:
𝐴𝑟𝑒𝑎 = 3.14 × 9²
Simplifying the equation:
𝐴𝑟𝑒𝑎 = 3.14 × 81
Calculating the multiplication:
𝐴𝑟𝑒𝑎 ≈ 254.34
Therefore, the area of the circle is approximately 254.34 square millimeters.