The corresponding sides of abc and def have equal lengths. the area of abc is 4 square units, and the longest side of def is 5 units long. what is the area of def

1. "The corresponding sides of (triangles) abc and def have equal lengths." means that the triangles are congruent, that is exactly identical, by the Side Side Side (SSS) postulate.

2. 2 congruent triangle, have equal area

3. A(DEF)=A(ABC)=4 square units

4 units squared