The figure above is a circle centered at ( 0,0 ) passing through point B ( 1,0 ). Draw the figure using GeoGebra and use the tools that you have learned to rotate B counterclockwise about the center O using an angle slider. Use Circular arc tool to construct arc BB'.

1. What is the length of the arc when the measure of the angle a is 90[size=50][size=85] [sup]0[/sup][/size][/size][sup][/sup] ? 180 [sup][size=85][/size]0[size=85][/size][/sup] ? 360 [sup][size=85][/size]0[size=85][/size][/sup] ?[br]2. What happens to the measure of arc BB' when the measure of the angle is more than 360[size=85] [sup]0[/sup][/size][sup][/sup] [size=100]?[br][/size]