1. **Problem statement:** We have a pyramid with a square base BDFH of side length 3 cm and slant edges of length 5 cm. The net consists of the square base and four triangular faces attached to each side. 2. **Diagram and measurements:** The net is drawn with the square BDFH in the center, each side 3 cm. 3. **Length of EA:** EA is the slant edge from apex A to vertex E on the net. Since the slant edges are 5 cm, EA = 5 cm. 4. **Assembling the pyramid:** When folded, the four triangular faces meet at apex A above the square base BDFH. 5. **Additional note:** The height of the pyramid can be found using the Pythagorean theorem if needed, but the problem only asks for EA length. **Final answer:** EA = 5 cm.