Geometry

Question Analysis:
This question focuses on the correct notation for congruent triangles.

Key Concept Explanation:
The congruence symbol ( ≅ ) is used to show that two triangles have the same size and shape.
The similarity symbol ( ∼ ) is used for similar triangles, not congruent ones.

Step-by-Step Solution:
Option A is incorrect because the equality symbol (=) does not represent geometric congruence.
Option B is incorrect because the similarity symbol (∼) does not indicate congruence.
Option C is correct because ≅ is the proper notation.
Option D is incorrect because adding triangles does not make sense in this cont...