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Auxiliary lines may be necessary to write the following direct proofs.

Problem :

Given: Line PQ is the perpendicular bisector of segment AB.
Prove: Point P is equidistant from points A and B.

Problem :

Segment AB is congruent to segment CB.
Angle BAD is congruent to angle BCD.
Segment AB is congruent to segment CD.

Problem :

Given: Segments TA and TB are tangent segments to circle O.
Prove: Segment TA is congruent to segment TB.

Marketing Management / Edition 15

Diagnostic and Statistical Manual of Mental Disorders (DSM-5®) / Edition 5