The measure of arc AB is 100°.
Given that the central angle of the circle is 100°.
We need to find the measure of the arc AB.
What is the measure of minor arc?
A minor arc is an arc smaller than a semicircle. A central angle which is subtended by a minor arc has a measure of less than 180°.
Here, the measure of the central angle is 100°, so the measure of arc AB is 100°.
Therefore, the measure of arc AB is 100°.
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