Undefined terms of Geometry
terms that are needed to define all other terms
In geometry, there are three undefined terms that form the foundation for all geometric concepts and ideas. These terms include:
1. Point: A point is a location that has no size or dimension. It is represented by a dot and is named using a capital letter.
2. Line: A line is a straight path that extends indefinitely in both directions. It has no thickness or width and is represented by a straight line with arrows at each end. It is named using any two points on the line.
3. Plane: A plane is a flat surface that extends infinitely in all directions. It has no thickness and is represented as a flat surface. It is named using a capital letter or by any three non-collinear points on the plane.
These terms are called undefined because they cannot be explained using other geometric ideas. Instead, they are simply accepted as basic concepts that are used to define other terms and concepts in geometry.
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