9. Identify the relationship between the two triangles.

Analysis:

• Triangle 1 (left): Has a right angle at P, and sides PK and PL marked with single tick marks, indicating they are equal. Angle LKP is 45 degrees. This means triangle PKL is a right-angled isosceles triangle.
• Triangle 2 (right): Has a right angle at S, and sides FS and ST marked with single tick marks, indicating they are equal. This means triangle FST is a right-angled isosceles triangle.
• Both triangles are right-angled isosceles triangles. The corresponding angles are 45°, 45°, and 90°.

Answer: The two triangles are congruent right-angled isosceles triangles (by ASA or AAS, considering the angles and equal sides).