Question

What additional information can be used to prove ΔDSB ≅ ΔTSR by SAS?

Answer 1

i believe the correct answer is
ST≈SD

Answer 2

Please find the attached file for a proper understanding of the question given here. The diagram in the file attached is the complete accompanying diagram of the question.

As per that diagram,
`RS\cong SB` (which is given)

and we know that
`\angle DSB\cong \angle RST` (vertically opposite angles).

Thus, the only way ΔDSB ≅ ΔTSR by SAS is when
`DS\cong ST` as indicated in the diagram.

Thus,
`DS\cong ST` is the correct answer.