Based on the relevant congruent theorems, all of the statements are correct except: D. △RST ≅ △UST by SAS.
Two triangles that have two pairs of corresponding congruent angles and a pair of corresponding non-included congruence angles are proven to be congruent by the AAS congruence theorem.
Thus, △RWS ≅ △UWT by AAS because they have two pairs of corresponding congruent angles and a pair of corresponding non-included congruence angles.
△RST cannot be proven to be congruent to △UST by SAS because there is no sufficient information.
Based on the reflexive property, ST ≅ ST. Also, using the CPCTC, all parts of the two congruent triangles are equal, therefore, ∠WTU ≅ ∠WSR.
The only statement that is incorrect is: D. △RST ≅ △UST by SAS.
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