Triangulation

Roger Doofenshmirtz, we know, is six feet and two inches tall

And the beam that hit him left a weird impression on that wall

So I took the angle from that point of where I knew he stood

And I found the building just like that because I understood

(Triangulation!)

That's how I figured it out

(Triangulation!)

Now I'm left with no doubt

The only geometric process using data I possess...

That could pinpoint the conclusion of my scientific quest

Triangulation!