Investigation 1

On the diagram below, drag the point around to move the transversal line.[br]
What do you notice?
Pauline was investigating angles between two parallel lines and wanted to find angles a and b on the diagram. Her friend Dominic suggested that she could measure them using a protractor.
How else could Pauline find angles a and b?
Write down what angle a and b would be in the box below.
What do you notice?

Information