To prove the two triangles congruent using the SAS (Side-Angle-Side) postulate, we need one pair of sides and the included angle to be congruent between the two triangles.
In this case, you already have the sides VM ≅ WV, and you also have the angle ∠VKM ≅ ∠VUW, which is included between the sides.
To satisfy the SAS condition:
- We already have the congruence of the sides (VM and WV).
- We also have the angle (∠VKM and ∠VUW).
Now, we need one additional piece of information that provides the congruence of one more pair of corresponding sides.
From the available options, the MK ≅ WU segment provides the necessary additional information.
So, the additional piece of information needed to prove the two triangles congruent using SAS is:
MK¯¯¯¯¯¯¯¯¯¯ ≅ WU¯¯¯¯¯¯¯¯¯.