The area of a circle can be calculated using the formula:
Area = πr²
where r is the radius of the circle. Given that the diameter of the circle is 4 inches, the radius is half of the diameter, which is 2 inches.
Plugging the radius into the formula:
Area = π(2)²
Area = π(4)
Area ≈ 12.566 square inches
So, the area of a circle with a diameter of 4 inches is approximately 12.566 square inches.