M2.5.1 For the adult
Straight lines and parallel lines
How do I draw a line that is exactly 6 cm long?
What this chapter teaches
Length on a ruler starts at the 0 mark, not at the end of the ruler. Parallel lines stay the same distance apart, however far they run. Lines that do not touch on the page may still meet if drawn longer.
Three questions to ask
There is no one right wording. Listen for the idea.
- Where do you put the ruler to draw a line 6 cm long, and why there?
- Two lines have not touched yet. How could you test whether they are parallel?
- Where can you find parallel lines in this room?
After the chapter, the learner can
- Draw a straight line of a given length with a ruler
- Find parallel lines around you, like the two sides of a door
What they copy into their notebook
Put the 0 mark on the start of the line. Parallel lines stay the same distance apart and never meet.