The distance from the center of a circle to any point on its circumference is called:

(a)  

The distance across a circle through its center, equal to twice the radius is called:

(a)  

The distance around the edge of a circle is called:

(a)  

A continuous section of a circle's circumference / a pert of a circumference is called:

(a)  

A unit of angle measurement equal to 1/360 of a full circle is called:

(a)  

Measured in degrees or radians:

(a)  

The process of changing from one unit of measurement to another, such as from degrees to radians is called:

(a)  

A unit of angle measurement equal to the angle subtended at the center of a circle by an arc of length equal to the circle's radius is called:

(a)