Documentation-of-the-Knowledge-Graph.md

@@ -75,7 +75,7 @@ Computing coordinates in different frames of reference can be done in 2 dimensio
 
 ![coordinates.svg](uploads/47c0c96e1fb8fddd63dc35df6495be60/coordinates.svg)
 
-The device has coordinates relative to the factory that are computed as follows: $x'_{\text{factory}} = x'\text{cos}(\alpha) + y'\text{sin}(\alpha)$ and $y'_{\text{factory}} = -x'\text{sin}(\alpha) + y'\text{cos}(\alpha)$ 
+The device has coordinates relative to the factory that are computed as follows: $`x'_{\text{factory}} = x'\text{cos}(\alpha) + y'\text{sin}(\alpha)`$ and $`y'_{\text{factory}} = -x'\text{sin}(\alpha) + y'\text{cos}(\alpha)`$. In 3D, we provide an additional angle representing the tilt of the *Z* axis with respect to the *XY* plane.
 
 ## Relations between sensing/actuating devices, observable/actuatable properties, and property/action affordances