Question

which segment is opposite to \\( \angle c \\)?

Explanation:

In a triangle, the side opposite an angle is the one that does not form the angle. For angle \(C\) in triangle \(ERC\), side \(ER\) does not form angle \(C\) (while \(EC\) and \(RC\) do form angle \(C\)).

Answer:

\(ER\)