The theorem that proves that triangles ABC and CDA are congruent is the ASA theorem
From the figure, we have the following highlights
- Angle 1 and 4 are congruent
- Angle 2 and 3 are congruent
- Both triangles have a common side length at length AC
The above highlights are represented as follows:
- Angle (A)
- Angle (A)
- Side (S)
Since the congruent side is between the congruent angles, then the theorem that proves that both triangles are congruent is the ASA theorem
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