Make a same GGb file as the following.
There are 5 objects on the Geometry View 1 (2 checkboxes, a circle equation, and 2 texts) and 2 objects on the Geometry View 2 (1 point and 1 circle). •By clicking the checkbox (Reset the circle) the x-, and y-coordinates (s and t) of the center and the radius (r) of the circle equation should be changed randomly. •When you place the point at the expected center, a new text (the hidden one) should appear saying something like 'You are right!!', and another button to show the circle.