The area of a circle is the amount of space contained within its boundary. It is calculated using the formula A = πr², where A represents the area, π (pi) is a constant approximately equal to 3.14, and r is the radius of the circle. The radius is the distance from the center of the circle to any point on its edge. Understanding circle area is important in various fields, including geometry and engineering. It helps in tasks such as determining the size of circular objects, calculating material needs for circular designs, and solving real-world problems involving circles, like those found in architecture and landscaping.