Concentric circles are circles that share the same center but have different radii. This means that each circle is located inside or outside the others, creating a layered effect. They are often used in various fields, such as mathematics, art, and design, to illustrate relationships or patterns. In real life, you can see concentric circles in many places, like in the ripples formed when a stone is thrown into a pond. Each ripple represents a different circle, expanding outward from the point of impact. This concept can also be applied in geography and urban planning to represent zones or areas around a central point.