Alternate Segment Theorem

Alternate Segment Theorem

The angle between a tangent and a chord at the point of contact is equal to the angle subtended by the chord in the alternate segment.

In the diagram, \(\angle x=\angle y\).

Abbreviation: \(\angle s\) in alt. seg.

Identifying the angles

Identify the tangent and chord. The equal angle lies in the alternate segment.

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