Slot Dimensioning - Basics, ASME

I am trying to dimension a part with a surface profile with slots like the part in the link below: ammJ1Oyn I want to

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dimensioning a slot dimension 2 Geometric tolerances, indicated by special symbols related The slot and the mating parts have basic dimensions of inches Lower

dimension slot My crappy work around for dimensioning slots without centerlines is to dimension to the midpoint of the line and the center of the radii then I