Finding center or midpoint of a slot

What could be causing this issue? I'm stumped Sketch on Part Drawing of Part

The 25L is the length of the slot Because it's not a circle, you do need two dimensions to determine its size (Don't confuse this with bolt

slot naga 777 Let's understand the way to dimension any drawing

slot machine with dollar bills Casino slot machines are gambling machines where a game of slots is played by inserting coins and pulling a handle to randomize an alignment of symbols