Perpendicular bisector
Exercise 1
Using the following tool 
construct the Perpendicuar bisector of the given segment.
Questions
How would you define "perpendicular bisector"?
Can you think of another way to construct the perpendicular bisector of a segment but without using the Perpendicular Bisector tool?
Exercise 2
Open a new GeoGebra worksheet and construct the perpendicular bisector of a segment in a different way. For this construction use the tools already explained, but without using the Perpendicular bisector tool. Save the exercise in your pendrive as Name_perpendbisector.ggb.
Help
If you position your mouse over the icon of the selected Tool, a Tooltip appears explaining how to use this Tool.
(f.e. 
Perpedicular Bisector: Select two points or one segment.)
Perpedicular Bisector: Select two points or one segment.)