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| Introduction |
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| Recall that if two straight lines are not parallel, they meet at a point when produced. |
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| Observe lines l and m which meet at a point (O). |
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| In the diagram, l and m are called intersecting lines. O is called the point of intersection. |
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| Similarly two line segments or two rays may intersect at a point. They are intersecting line segments or intersecting rays. |
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| Now observe lines l, m, n passing through the same point. What do you call the point where they meet? What do you call such lines? |
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| "If three or more lines pass though the same point, they are called concurrent lines". When three or more lines pass through the same point O, then O is called their point of concurrence. |
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| AB, CD, EF are concurrent line segments. They pass through the same (or common) point O. |
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| PQ, RS, MN are concurrent rays. They pass through the same point O. |
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| In the above diagrams 'O' is the point of concurrence. |
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| Three or more lines / line segments /rays which pass through the same point are called concurrent. |
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