Question

1. true or false, the two triangles are congruent by sss.

Explanation:

Step1: Recall SSS congruence criterion

SSS (Side - Side - Side) congruence states that if the three sides of one triangle are equal to the three corresponding sides of another triangle, then the two triangles are congruent.

Step2: Check side - side equality

There is no information given about the side - lengths of the two triangles $\triangle ABC$ and $\triangle DEF$. Just the angles are shown (by the arc - markings), but no side - length equality is indicated. So, we cannot conclude they are congruent by SSS.

Answer:

false