What is true regarding two adjacent arcs created by two intersecting diameters?
they always have equal measures.
the difference of their measures is 90°.
the sum of their measures is 180°.
their measures cannot be equal.

Answer – The sum of their measures is 180 degreed

When two diameters of the same circle intersect, four arcs are created. The
following are true of these arcs:
- Opposite arcs are equal in measure
- The sum of the measure of adjacent arcs is 180 degrees
- The sum of the measure of all the arcs is 360 degrees