Geometry

Question Analysis:
This question involves applying the concept of corresponding sides in congruent triangles to determine a missing side length.

Key Concept Explanation:
In congruent triangles, corresponding sides are equal in length.
The naming order of the triangles indicates which sides correspond to each other.

Step-by-Step Solution:
Given ⊿GHI ≅ ⊿KLM, the vertex correspondence is:
G ↔ K, H ↔ L, I ↔ M.
Therefore, side GI corresponds to side KM.
Since GI = 12 cm, KM must also be 12 cm.

Option Analysis:
A: Incorrect (does not match corresponding side length).
B: Correct (KM corresponds to GI).
C: Inc...