Music, the art of manipulating the combination of vocal or instrumental sounds to achieve formal beauty or emotional expression, generally follows the cultural standards of rhythm, melody, and harmony in most Western music. Simple folk songs and complex electronic compositions all belong to the same activity, music.
The measure of an inscribed angle is half the measure of the intercepted arc. That is, m∠ABC=12m∠AOC. This leads to the corollary that in a circle any two inscribed angles with the same intercepted arcs are congruent.
