1. **State the problem:** We are given three adjacent angles around a vertex: 56°, 26°, and $n$. We need to find the value of $n$. 2. **Formula used:** The sum of angles around a point is always 360°. This is a fundamental rule in geometry. 3. **Set up the equation:** $$56^\circ + 26^\circ + n = 360^\circ$$ 4. **Combine known angles:** $$82^\circ + n = 360^\circ$$ 5. **Solve for $n$:** $$n = 360^\circ - 82^\circ$$ 6. **Calculate:** $$n = 278^\circ$$ **Final answer:** $n = 278^\circ$