We know that segment QS bisects angle TQR because . By the definition of angle bisector, angle TQS is congruent to angle . We see that segment QS is congruent to segment SQ by . Therefore, we can conclude that triangles QRS and QTS are congruent by .
Answer
A
QSR
B
RQS
C
SRQ
Explanation
An angle bisector divides an angle into two congruent angles. Since QS bisects angle TQR, the two angles are TQS and RQS, so the missing angle is RQS (choice B).
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