An angle whose vertex is at the center of a circle
- An angle whose vertex is at the center of a circle is a middle angle of that circle
- An angle whose vertex is at the center of a circle and whose sides are radii
- An angle whose vertex is at the center of a circle is called a
- An angle whose vertex is at the center of a circle is a central angle of that circle
- An angle whose vertex is at the center point of a circle