Circle Z is shown. Line segments ZT, ZU, and ZV are radii of the circle. Line segment UX goes through point X and is a diameter. Line segment WY goes from one side to the opposite side and intersects line segment UX at point S. Line segment WX is a secant. Angle XWX is 42 degrees, angle WSY is 100 degrees, and angle TZU is 79 degrees.

Complete the statements about circle Z.

A central angle, such as angle ____ of circle Z, is an angle whose vertex is ____ and whose sides are radii of the circle.

Angle ____ is not a central angle of circle Z.

The degree measure of an arc is ____ the degree measure of the central angle that intercepts it.

The measure of ____ is ____ degrees.