To determine what information is missing for Estefania to prove that \( \triangle KLM \cong \triangle UTS \) using the ASA Congruence Theorem, we need to analyze the information provided.
The ASA Theorem states that if you have two angles and the included side of one triangle congruent to two angles and the included side of another triangle, then the triangles are congruent.
Given the options you provided, we should look for:
- Two angles in both triangles should be congruent.
- One side (the side that is included between the two angles).
Now let's evaluate the options:
- KM ≅ US: This option does not help in proving ASA because it compares a side but does not involve angles.
- ∠M ≅ ∠S: This gives us one angle congruence, but we need one more angle from triangle \( KLM \) and the side between the angles.
- KL ≅ UT: This option compares another side, but again it doesn’t help us prove ASA.
- LM ≅ TS: Similar to the others, this compares sides.
To use the ASA theorem, you need two angles congruent and the side between those angles congruent. It appears that the angle information (∠M and ∠S) isn't enough perhaps because you’re missing either another angle or confirmation of the included side.
If you already have one angle congruent (∠M ≅ ∠S) and know the included side (either KM, KL, or LM), check which angle you need that corresponds with the other triangle (like ∠L ≅ ∠T).
Therefore, the missing information is likely either:
- The congruence of another angle, such as ∠K being congruent to ∠U (or similar) to complete the ASA setup.
Based on this evaluation, select the information relating to either providing another angle or confirming a valid angle-side configuration to confirm ASA.