GeoGebra has a steep learning curve at first, but the benefits are many.
Here is a little example demonstrating how control buttons and check boxes can help you control what is displayed. while maintaining interactivity of the display.
I might have used this in class by asking students to first give what they think an angle bisector (or median) might be. I could have projected this on the board, had the class give its best, and then show what the results actually are.
When discussing compass and straightedge constructions, project this on the board, demonstrate the construction, then let compare work with the Geogebra results.
The only limitations are your imagination together with the skills you have learned.
The file can be downloaded here.
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