Question

△acb ≅ △dce, find de. de = ?

Explanation:

Step1: Recall congruent triangles property

If two triangles are congruent, their corresponding sides are equal. So in $\triangle ACB \cong \triangle DCE$, the corresponding side of $DE$ is $AB$.

Step2: Identify length of corresponding side

From the diagram, the length of $AB$ is 8. Since $DE$ corresponds to $AB$ in congruent triangles, $DE = AB = 8$.

Answer:

8