Geometry

The word that extends without end in two dimensions and is always flat is B.Planes.

Here's an analysis of each option:

A.Points: A point is a zero-dimensional object. It has no length, width, or height. It simply represents a location in space and does not extend in any dimension, let alone two dimensions.

B.Planes: A plane is a flat, two-dimensional surface that extends infinitely in all directions within those two dimensions. It has length and width but no thickness and contin...