PLANE GEOMETRY
1.
Introduction
of plane geometry ( point, line, fields, and angles )
Four basic elements that build geometry are point, line, area, and angle. The point is a circle which have radius zero. Point is represented as a dot "." and is named with a capital letter. Meanwhile, the line is seen as the set of points which essentially considers only its straightness and can be extended to the 2 directions. Field is seen as the set point - a point which is essentially just his attention to alignment and can be expanded in all directions. While the angle is the union of two rays starting point allied lines.
Here are some examples of definitions that can be derived from the terms point
and line :
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