The ranges in the table (e.g., "Over 10 up to 50") refer to the of the angle, not the length of the hypotenuse or the longer side.
Here is the most misunderstood aspect of ISO 2768 angular tolerances: iso 2768 angular tolerance
Drawing a 90° corner on a 200mm bracket and writing "ISO 2768-f" (Fine). Reality: Fine class for a 200mm leg gives you roughly ±5′ (0.08°). That is incredibly tight. The machinist will need to set up the part on a sine plate or use a CMM to verify. Your "simple" bracket just became expensive. The ranges in the table (e