What is the area of a 43mm circle?

To find the area of a circle, you can use the formula A = πr², where r is the radius. For a circle with a diameter of 43 mm, the radius is 21.5 mm (43 mm divided by 2). Plugging this into the formula gives A ≈ π × (21.5 mm)² ≈ 1454.37 mm². Thus, the area of the 43 mm circle is approximately 1454.37 square millimeters.