An angle of `42.5^(@)` can be constructed.

Explanation

To construct an angle of \(42.5^\circ\), we need to analyze the problem step by step.

### Step-by-Step Solution:

1. **Understand the Angle**:
- We know that \(42.5^\circ\) is half of \(85^\circ\). Therefore, if we can construct \(85^\circ\), we can easily find \(42.5^\circ\) by bisecting it.

2. **Check Constructibility of \(85^\circ\)**:
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