Assertion: cartesian coordinate system's origin | /r/AtLocation | the center of the grid
Facets:
value: in the illustration
type: LOCATION
value: in figure 2.10.1
type: LOCATION
Source sentences:
text: In Figure 2.10.1, above, the origin (0,0) is located at the center of the grid.
text: In the illustration above, the origin (0,0) is located at the center of the grid (the intersection of the two bold lines).