It is still called a circle.
concentric circles
Close - they're called concentric circles.
Concentric circles.
Yes, it is. Circles that are in the same plane and having the same center are called congruent circles.
concentric circles
Concentric circles.
Concentric Circle
Yes. The circles can be of different size. These are called concentric circles.
Any circle on the surface of a sphere whose center is at the center of the sphere is known as a "great circle." Great circles represent the largest possible circles that can be drawn on a sphere and divide the sphere into two equal hemispheres. The equator of a planet and the lines of longitude are examples of great circles. In contrast, smaller circles that do not have the same center as the sphere are called "small circles."
Circles that have the same center point are referred to as concentric circles. These circles can have different radii, resulting in varying sizes, but they share the same center. This arrangement is often seen in designs and patterns, illustrating the concept of concentricity in geometry.
Circles in the same plane with the same center are concentric circles.
The center of a ripple is called the focal point. This is where the disturbance that creates the ripple originates, spreading outwards in concentric circles.