Final answer:
In similar right triangles, the corresponding sides are proportional. The slope of a side is not necessarily the same as the slope of a corresponding side in similar triangles. Triangular congruence occurs when the corresponding sides and angles of two triangles are equal.
Step-by-step explanation:
In similar right triangles, the corresponding sides are proportional. Therefore, statement A is correct: sides AB and BC are proportional to sides CD and DE.
However, the slope of a side is not necessarily the same as the slope of a corresponding side in similar triangles. Therefore, statement B is incorrect: side AC does not have the same slope as side CE.
Triangular congruence occurs when the corresponding sides and angles of two triangles are equal. Since we only know that the sides are proportional and not equal, statement C is incorrect: triangle ABC is not congruent to triangle CDE.
Lastly, congruent triangles have all corresponding sides equal in length. Since we only know that the sides are proportional and not equal, statement D is incorrect: side AC is not congruent to side CE.