The term ‘Geometry’ is derived from the Greek word ‘Geometron’. This has 2 equivalents. ‘Geo’ means Earth and ‘metron’ means Measurement.
Points
- It is a position or location on a plane surface, which are denoted by a single capital letter.
- It is denoted by a dot.
- Capital letters are used to name a Point.
Line Segment
- It is a part of a line with the finite length and 2 endpoints.
- The points E and F are called the endpoints of the segment.
- It is named as: line segment EF or line segment FE
Line
- It is made up of infinitely many points with infinite length and no endpoint.
- It extends indefinitely in both directions.
- Single small alphabet is used to name a line.
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Intersecting Lines
- The two lines that share one common point are called Intersecting Lines.
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- This shared point is called the point of intersection.
- Here, line q and p are intersecting at point O.
Parallel Lines
- Two or more lines that never intersect (Never cross each other) are called Parallel Lines.
Ray
- It is a part of a line with one starting point whereas extends endlessly in one direction.
