1. The question asks about constructing segment $MK$ to form another triangle in the given figure. 2. To construct segment $MK$ to create a new triangle, we need to identify points $M$ and $K$ such that $MK$ forms a side that either joins two existing points or creates an intersection. 3. Usually, $MK$ should connect known points in the existing figure, ensuring the triangle satisfies geometric properties such as sum of angles equal 180 degrees. 4. Without the original figure, the general method is to find $K$ such that it lies on a relevant line or segment, and then draw $MK$ as a straight segment. 5. This construction typically involves using principles like parallel lines, angle bisectors, or known distances to position $K$ correctly. 6. Thus, knowing where $K$ is or how it relates to other points is key to constructing $MK$ and forming a new triangle. 7. In conclusion, construction depends on geometric relations and given data in the figure which directs drawing segment $MK$ to form the triangle.