Identify the two minor arcs
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A minor arc is an arc smaller than a semicircle. A central angle which is subtended by a minor arc has a measure less than 180°. ... A semi-circle is associated with half of a rotation which is 180°. Minor arcs are associated with less than half of a rotation, so minor arcs are associated with angles less than 180°.
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A chord, a central angle or an inscribed angle may divide a circle into two arcs. The larger of the two arcs is called the major arc. In the illustrations below the circle is divided into two arcs.
Minor arcs are named with the word "arc" or the words "minor arc" and two or three letters (usually two letters). For example arc(BC), minor arc(BC), arc(BDC) and minor arc(BDC) all refer to the minor arc shown in the illustration below. For the minor arc example below, arc(BC) or minor arc(BC) would probably be used.
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