Normally a straight line segment.
A chord is a line segment between two points on a given curve. Basically it's two points that are connected with a line which all happens to be on a curve. Most likely a circle
The locus of all points that are the same distance from two given points is a perpendicular bisector of the line segment connecting those two points. This line is equidistant from each of the two points at all locations along its length.
sphere
The description you've provided refers to "intervals" or "continuous sets" in mathematics. These sets include all points within a certain range and cannot be expressed as finite or countable lists of elements. For example, the set of all real numbers between two endpoints is an interval that includes all values in that range, including those between isolated points. This concept is crucial in calculus and real analysis, where continuity and limits are fundamental.
Normally a straight line segment.
A sphere is a solid bounded by the set of all points at a given distance from a given point.
A chord is a line segment between two points on a given curve. Basically it's two points that are connected with a line which all happens to be on a curve. Most likely a circle
A circle is the set of all points in a plane at a given distance FROM a given point, which is known as the circle's center.
The locus of all points that are the same distance from two given points is a perpendicular bisector of the line segment connecting those two points. This line is equidistant from each of the two points at all locations along its length.
line
The set of all points a given distance from a center point is a circle. The given distance is the radius, and the given point is the center. Or, in 3 dimensional space, a sphere.
sphere
Straight line
The set of all points a given distance from a center point is a circle. The given distance is the radius, and the given point is the center. In 3 dimensional space, the set would be the surface of a sphere.
Circle!
All points less than 3 distant from point 'P' comprise a circle, centered at 'P', with a radius of 3, but NOT including the line that is the circumference of the circle.