1. **State the problem:** We need to find the size of angle $n$ given that it and a $52^\circ$ angle form a straight line.
2. **Recall the rule:** Angles on a straight line add up to $180^\circ$.
3. **Set up the equation:**
$$n + 52^\circ = 180^\circ$$
4. **Solve for $n$:**
$$n = 180^\circ - 52^\circ$$
5. **Calculate:**
$$n = 128^\circ$$
6. **Conclusion:** The size of angle $n$ is $128^\circ$.
Angle N 6E1754
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