Congruent means that two figures have the same shape. Non-congruent means they don't. There is no "similarity"; two non-congruent figures can be just about anything, for example a square and a circle.
What the word congruent and circle have in common is that circles have a congruent radii. All of the radii in a single circle is congruent to each other.
Yes, all of the radii in a single circle are congruent.
Yes, there can be congruent arcs on a circle. Arcs which subtend the same angle at the center are considered as congruent.
In the same circle, or in congruent circles, two minor arcs are congruent if and only if their corresponding chords are congruent.
Non-congruent or incongruent is the opposite of congruent.
No they can not be congruent because they are different shapes.
Non-congruent represents something that is not in agreement, If superimposed it does not coincide. If two figures don't have the same shape they are considered non-congruent in Geometry. In order to be considered congruent, a figure must be the mirror image of another, if it is not, the figure is non-congruent.
Chuck Norris can prove it
Congruent arcs are circle segments that have the same angle measure and are in the same or congruent circles.