Question

which side is opposite of \\( \angle a \\)?

Explanation:

Step1: Recall the definition of opposite side in a triangle

In a triangle, the side opposite an angle is the side that does not form the angle.
For \(\angle A\), the sides forming \(\angle A\) are \(AC\) and \(AB\).

Step2: Identify the non - forming side

The side that does not form \(\angle A\) is \(BC\).

Answer:

BC