Circle with center at O contains a central angle measuring 90 degrees and a radius of 4 in.

1. What would the intercepted arc of a 90 degree central angle measure in degrees?

2.What would the major arc of a circle that contains a 90 degree central angle measure in degrees?

3. Suppose the radius of the circle measures 4 in. what is the circumference of the circle?

4. What would the arc length of an intercepted arc of a 90 degree central angle measure in inches if the radius of the circle measures 4 in?

5. Suppose a chord is drawn connecting two of the radii of the 90 degree central angle, forming a right triangle, what is the measure of the chord ?