Use the drop-down list and the appearing check boxes and sliders to discover the parts of a circle.[br]Drag the points to explore different configurations.
A chord is a segment joining two points on the circle.[br]What is the name of the longest chord in a circle? [br]Can you relate its length to the length of the radius?
The endpoints of a diameter split the circle in two arcs.[br]What is the name of these arcs?[br]What is the relationship between the two of them?
If you draw two radii of a circle, what is the name of the region enclosed by these two radii and the corresponding arc?[br]Is there only one such region, or more than one?[br]Draw your conclusions on paper, or create a GeoGebra construction showing your answer.