Distance to problem?

It’s only me, unfortunately with yet another question, although hopefully a quick one:
From this position in the thick red outlined trigger box, the distance to the thinner outlined trigger box in front, I’m getting a reading of 180.55, each trigger box is 100 x 100 does this sound correct?

Seems like its a lot more than it should be?
XYZ co ords are;
First trigger (thick outline): -115, 67, 115
Second Trigger (thin outline): -115, 247, 55

I’d really appreciate your help as it seems to be the last hurdle.