Question

it is given that △abc and △def are both right triar right angle. all right angles are congruent, so ∠c ≅ ∠f
it is given that ∠b ≅ ∠e and that overline {ab} ≅ overline {de}.
overline {ab} is side between ∠b and ∠c.
overline {de} is side between ∠e and ∠f.
througl follows △def by the tr
theore

Explanation:

Step1: Analyze the position of \( \overline{DE} \)

Since \( \angle E\) and \( \angle F\) are two angles of \( \triangle DEF\), and \( \overline{DE}\) is between \( \angle E\) and \( \angle F\), according to the definition of an included - side (a side that is common to two angles of a triangle), we can determine the type of the side.

Answer:

an included