definition
Line: A line is a geometric figure that consists of an infinite number of points lined up straight that extend in both directions forever.
Collinear points: If three or more points lie on the same line, they are called collinear points.
Non-collinear points: If three or more points don't lie on the same line, they are called Non-collinear points.
notes
Line:
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A line is a geometric figure that consists of an infinite number of points lined up straight that extend in both directions forever.
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A line has no endpoints on either side.
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A line is one-dimensional. That is, a line has length, but no width or height.
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A line is uniquely determined by two points.
- The line passing through the points A and B is denoted by `
\[\overleftrightarrow{AB}\].
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Sometimes small letters l, m, n, etc. will be used to denote lines.
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One and only one line can be drawn through any two distinct points.
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If three or more points lie on the same line, they are called collinear points.
Points not on the same line are the non-collinear points.
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An infinite number of lines can be drawn through one point.
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When two or more lines pass through the same point, they are called concurrent lines, and the common point through which they pass is called their point of concurrence.
