Angles at a point add up to 360&deg;. Vertically opposite angles are equal.<br><br>
&bull; Read the given angles from the diagram at the point where the lines meet<br>
&bull; Angle n = 360&deg; − sum of the other given angles around the point<br>
&bull; Angle n = 360&deg; − 223&deg; = 137&deg;<br><br>
Final Answer: 137