Question

The corresponding sides of `DeltaABC` and `DeltaDEF` have equal lengths. The area of `DeltaABC` is 4 square units, and the longest side of `DeltaDEF` is 5 units long. What is the area of `DeltaDEF`?

Answer 1

Since for the two triangles, the three pairs of corresponding sides are congruent, then the triangles are congruent and their areas are equal.

area = 4 square units