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Points and lines
Point
 A point in geometry is a location. It has no
size i.e. no width, no length and no depth. A
point is shown by a dot.
 A line is defined as a line of points that extends infinitely in two directions. It has
one dimension, length. Points that are on the same line are called collinear points.
 A line is defined by two points and is written as shown below with an arrowhead.
 Two lines that meet in a point are called intersecting lines.
 A part of a line that has defined endpoints is called a line segment. A line
segment as the segment between A and B above is written as:
 Line m
 
 Line ab infinite in length
 points a and b lie on the line
 lie in the line
 m and n intersect at p
 m  n = p
 P is the intersection of m and n
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Points and-lines

  • 2. Point A point in geometry is a location. It has no size i.e. no width, no length and no depth. A point is shown by a dot.
  • 3. A line is defined as a line of points that extends infinitely in two directions. It has one dimension, length. Points that are on the same line are called collinear points.
  • 4. A line is defined by two points and is written as shown below with an arrowhead.
  • 5. Two lines that meet in a point are called intersecting lines.
  • 6. A part of a line that has defined endpoints is called a line segment. A line segment as the segment between A and B above is written as:
  • 7. Line m Line ab infinite in length points a and b lie on the line lie in the line
  • 8. m and n intersect at p m n = p P is the intersection of m and n