To prove that STUV is a parallelogram, we can use the property that opposite sides of a parallelogram are congruent. Therefore, the correct answer would be:
ST̅̅̅̅̅ congruent to UV̅̅̅̅̅ and TU̅̅̅̅̅ congruent to SV̅̅̅̅̅.
This can be expressed formally as:
- ST ≅ UV
- TU ≅ SV