Question

What side do DEC and EDB have in common?

Answer 1

If this were an angle it would surely be side DE & ED because both sides of that certain angle contains both point D and point E. It would serve as the common sides of that angle. This one is not adjacent to each other but both share common sides and also not common vertex.

Answer 2

DE is the common side in the two triangles

Step-by-step explanation:

The side of the triangle is named based on its start and end points

A triangle is named based on its three vertices where each two vertices would join forming a side

For ΔDEC, the sides are:

DE, EC and DC

For ΔEDB, the sides are:

ED, DB and EB

By comparing the two triangles, we would find that DE is the common side in both triangles

Note: The visual illustration is in the attached image

Hope this helps :)