For this task, you'll need to construct a circle with checkboxes showing the different parts (follow [url=http://www.geogebra.org/material/simple/id/3529]this link[/url] for an example). The words you need to include checkboxes for are:[br]Chord[br]Secant line[br]Tangent line[br]Diameter[br]Radius[br]Arc[br]Sector[br]Circumference[br]Central angle[br]Inscribed angle[br]You may need to do some research to find out how to show some of these words.[br]You may want to use a separate GeoGebra window. If so, please make sure to save your construction under your account, and paste the link in the comments below this post.