Pearson Geometry Common Core, 2011
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Pearson Geometry Common Core, 2011 View details
2. Chords and Arcs
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Exercise 51 Page 779

Notice that segment SQ is a diameter of the given circle.

180

Practice makes perfect
In the given diagram, we want to find the measure of the arc STQ.

Note that the segment SQ is a diameter of the circle. Therefore, the arc STQ forms a semicircle and measures 180.