Vertically opposite angles are equal. Angles on a straight line add up to 180&deg;.<br><br>
&bull; GH and IJ are straight lines crossing each other<br>
&bull; Read the given angle from the diagram (likely 68&deg;)<br>
&bull; Angle t and the given angle are supplementary on a straight line<br>
&bull; Angle t = 180&deg; − 68&deg; = 112&deg;<br><br>
Final Answer: 112