Geometry
(Video)
Parallel lines remain an equal distance apart no matter how far they extend. However, they can be intersected by one or more lines called transversals.
These resources are part of KET's Measurement and Geometry collection.
This video segment originally appeared in KET’s GED Connection series.
When two lines lie on a flat surface, they are parallel or else they intersect. Parallel lines never meet or intersect. They remain an equal distance apart no matter how far they are extended.
However, parallel lines may be intersected by one or more lines. These intersecting lines are called transversals. A transversal creates four angles at each intersection. Because the transversal crosses both lines at the same angle, we can find relationships among the angles.
Understanding these relationships will help you solve for unknown angle measures.
Show the video about parallel lines crossed by a transversal. Have learners work in teams to draw and calculate measurements of the angles created when a transversal crosses parallel lines. Then have the teams explain their drawings to one another.
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