Circles have infinitely many arcs, not just 3.
Adjacent Arcs
No
Yes, two arcs of a circle are congruent if and only if their associated radii are congruent. This is because congruent arcs subtend equal angles at the center of the circle, which means the radii connecting the center to the endpoints of the arcs must also be equal in length. Thus, the congruence of the arcs directly correlates to the congruence of their respective radii.
Diameter
Major arc is the longer of two arcs.
Yes, there can be congruent arcs on a circle. Arcs which subtend the same angle at the center are considered as congruent.
Circles have infinitely many arcs, not just 3.
Congruent Arcs
Adjacent Arcs
Half of the circle is an arc
No
Divide the arc's degree measure by 360°, then multiply by the circumference of the circle.
Diameter
Because they are parts of the circumference of a circle
In the same circle, or in congruent circles, two minor arcs are congruent if and only if their corresponding chords are congruent.
Trefoil