What is the base area calculation for a cylinder?

The base area calculation for a cylinder is determined by looking at its circular base. To find the area of a circle, you use the formula πr², where r represents the radius of the circle. Since the base of a cylinder is a circle, this formula applies directly.

The other options represent different geometric calculations. The formula for lw corresponds to the area of a rectangle, which is not relevant for a circular base. The formula 1/3πr²h describes the volume of a cone, not a cylinder. The symbol h simply represents height and does not give any area measurement. Therefore, πr² is the correct choice for the base area of a cylinder.