# AET - Visualisation Activity 9

- Author:
- Adam Unwin-Berrey

AET - Visualisation Activity 9
Imagine two parallel lines of infinite length … Make them horizontal, not too far apart.
Keep them fixed in this position.
Imagine a vertical line which crosses the parallel lines … Think to yourself: How many points of intersection can I see? …
Can you see eight angles? Count them to make sure.
Now very slowly rotate the vertical line clockwise. As you slowly rotate the line, think to yourself: What happens to the angles? …
Which angles are equal?