Hello!
The area of a circle is given using the formula: A = πr².
Given that the diameter is 6.3 millimeters, we need to find the radius. Remember, the radius of a circle is half the diameter.
R = 6.3 / 2 = 3.15 millimeters
With the radius, we can substitute the values into the formula and solve.
A = π(3.15)²
A = 9.9225π
A = 9.92π (not multiplying by π), 31.17 (multiplied by π), 31.16 (multiplied by 3.14)
Therefore, the area of the circle is about 31.17 millimeters squared.