Part of a circumference is _____.
Radius
Diameter
Center
Arc
Circumference is the length of the boundary of a circle. A part of it is called an arc.
A part of the circumference of a circle is called a/an ___
AB is a chord of a circle. AB divides the circumference of the circle into two parts. The part with the longer length is called ____ and the part with shorter length is called ____.