Perpendicular and parallel straight lines 1 1/2

- Lesson Aims
During the folding processes the pupil will relate to perpendicular and parallel lines and segments.
- Name of Model
There is no model in this lesson.
- The Lesson Structure
According to planned curriculum.
- Lesson content
This is a prepatory lesson to the next lesson about parallel and perpendicular lines and segments with the model of a dress. In the lesson the pupils investigate the properties of parallel and perfpendicular lines using their measuring tool.
- Prior Knowledge
The concepts of angle,a right angle and a square.
- Materials
Origami sheets 15/15 cm and measuring tool.
- Additional knowledge
For the teacher.
If two straight segments are both perpendicular to a third straight line then the two segments are parallel.
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A transversal line that is perpendicular to one of two parallel lines will also be perpendicular to the other parallel line.