Given: RS is congruent to RT; RU bisects angle SRT

Prove: Angle S is congruent to Angle T

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Reflexive
angle SRU is congruent to angle TRU
Given
RS is congruent to RT; RU bisects angle SRT
CPCTC
SAS (Side-Angle-Side)
RU is congruent to RU
Triangle SRU is congruent to Triangle TRU
Angle S is congruent to Angle T
Definition