Answer:
Option 1 - side AC
Explanation:
Given : The figures and CD↔?
To find : Choose the correct correspondence ?
Solution :
Examining at triangles ABD and ACD, they appear to be congruent.
This means they have corresponding or matching parts which are equal and form each triangle.
The segment AB is the shortest segment of triangle ABD.
It matches to the shortest segment in ACD.
So, this segment is AC.
Therefore, CD↔AC i.e.option 1 is correct side AC.