A plane is the set of all points in 3-D space equidistant from two points, A and B. If it will help to see it, the set of all points in a plane that are equidistant from points A and B in the plane will be a line. Extend that thinking off the plane and you'll have another plane perpendicular to the original plane, the one with A and B in it. And the question specified that A and B were in 3-D space. Another way to look at is to look at a line segment between A and B. Find the midpoint of that line segment, and then draw a plane perpendicular to the line segment, specifying that that plane also includes the midpoint of the line segment AB. Same thing. The set of all points that make up that plane will be equidistant from A and B. At the risk of running it into the ground, given a line segment AB, if the line segment is bisected by a plane perpendicular to the line segment, it (the plane) will contain the set of all points equidistant from A and B.
A sphere.
Sphere?
In 2-dimensional space, a circle. In 3-dimensional space, a sphere.
A plane midway between the two given planes and parallel to them.
There is no such thing as a two-dimensional space. By virtue of being a space, you are talking three dimensions. It sounds like what you're really asking is: What is a two-dimensional AREA bounded by an infinite set of points (or infinite number of sides - same thing)? Typically, that would be a circle...however you didn't specify the points all had to be equidistant from its center so it could be any irregular shape containing at least one curve (any curved portion would automatically have to contain infinite points). The best way to ask the question so that the only answer would be 'a circle' is: What is a two-dimensional area formed by an infinite set of points, all of which are equidistant from its center?
A sphere.
Sphere
Sphere?
A circle, rotated about any diameter, will generate a sphere with the same radius. A circle is the locus of all points in 2-dimensional space that are equidistant from a fixed point. A sphere is the locus of all points in 3-dimensional space that are equidistant from a fixed point.
A sphere would fit the given description.
In 2-dimensional space, a circle. In 3-dimensional space, a sphere.
A plane midway between the two given planes and parallel to them.
That's a sphere whose radius is the constant equal distance.
There is no such thing as a two-dimensional space. By virtue of being a space, you are talking three dimensions. It sounds like what you're really asking is: What is a two-dimensional AREA bounded by an infinite set of points (or infinite number of sides - same thing)? Typically, that would be a circle...however you didn't specify the points all had to be equidistant from its center so it could be any irregular shape containing at least one curve (any curved portion would automatically have to contain infinite points). The best way to ask the question so that the only answer would be 'a circle' is: What is a two-dimensional area formed by an infinite set of points, all of which are equidistant from its center?
surface area of a cylinder? No. In 2-dimensional space, a circle and in 3-d, a sphere.
I'm not sure, but I would imagine they would be 360O around the point and only in the same plane.
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.