The correct word to fill the blank is:
- In a circle or congruent circles, congruent central angles have congruent arcs.
Congruent circumferences.
It is mentioned that two circles are congruent if they have the same radius, therefore, they could be superimposed and coincide perfectly, in addition to the fact that it can be identified that in two congruent circles, their central angles are congruent and, therefore, their arcs are equally congruent.
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