To verify that the angles in the same segment of a circle are equal.
Segments of a Circle :
In the following diagram, ∠APB is in the major segment and ∠AQB is in the minor segment. So, we say that ∠APB and ∠AQB are in different segments.
In the following diagram, ∠PRQ and ∠PSQ are in the major segment. So, we say that ∠PRQ and ∠PSQ are in the same segment.
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