1. Load this Geogebra file

You should see this construction.

2.  You will move point A on the line to represent problem 2a from page 58 in your Maths Text book.

You should see the the red and green angle change.

3. Now add your own angle to the transversal line.

1. What happens to the red and green lines if the angle becomes 180^o ?
2. Make up your own question!!
3. Use a spreadsheet data file reveal a relationship between the red and green angles?

4. Save a copy of your Geogebra construction in your "Maths is Amazing" folder.