Best answer:
Ball.
In mathematics, it is used to describe any neighborhood where distances from a point, in any direction (regardless of the number of dimensions) are equal.
In one dimension, a ball of radius 1 is an interval (for example, if the centre is 3, then the ball goes from 2 to 4)
In two dimensions it is a disk (the...
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Best answer: Ball.
In mathematics, it is used to describe any neighborhood where distances from a point, in any direction (regardless of the number of dimensions) are equal.
In one dimension, a ball of radius 1 is an interval (for example, if the centre is 3, then the ball goes from 2 to 4)
In two dimensions it is a disk (the word "circle" would represent only the border itself, not the inside).
In 3 dimensions, a sphere.
In 4, some people use hypersphere.
In any number of dimensions (including the ones above), the word "ball" works.