In the given figure, we have two triangles, triangle BCF and triangle HKL, and some intersecting lines.
Let's analyze the markings:
Based on the Angle-Side-Angle (ASA) congruence criterion, if two angles and the included side of one triangle are equal to two angles and the included side of another triangle, then the triangles are congruent.
Here, we have:
Therefore, triangle BCF is congruent to triangle LHK (by ASA congruence).
Since the triangles are congruent, their corresponding sides and angles are equal:
Also, the intersection point L implies that angles BLC and FLK are vertically opposite, and angles BLF and CLK are vertically opposite.
Conclusion: Triangle BCF is congruent to triangle LHK by ASA. This implies that their corresponding sides (BF=LK, CF=HK) and angles are equal.