You could do that with, I don't know, I'm not exactly a surveyor, but I guess a viewfinder or something like that. So you're able to, and I'm not sure if that's the right tool, but there are tools that you can measure the angles between the horizontal and something that's not on the horizontal. So you know that this angle right over here is pi over four radians, or 45 degrees. We're gonna keep it pi over four, because when you take derivatives of trig functions, you assume that you're dealing with radians. So right over here, this is pi over four radians. And you also are able to measure the rate at which this angle is changing. So this is changing, changing, changing at 0.2 radians per minute.