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| Parallel lines |
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| Two lines are parallel if they are coplanar and they do not intersect each other even if they are extended on either side. |
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| However, there are lines that do not intersect and yet are not parallel. They are skew lines. Skew lines are lines that are not coplanar and do not intersect. AE and HG are skew lines. |
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| Activity 1: |
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| Distance between parallel lines: |
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| Draw two lines along the two edges of a scale. You get parallel lines (l and m). |
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| Let l || m. |
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| The term “parallel” is also applied to |
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 Line segments and |
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 Rays when the lines they determine are parallel. |
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| Activity 2: |
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| Draw parallel line segments and parallel rays as shown below. |
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| The distance between parallel lines is the same at every point. |
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