trying to understand the maths behind trilateration, we have 3 access points (AP 1,2,3) and we know the centre coordinates of theses 3 (AP). Lost device (X) is the location where all 3 circle intersect.
example GRID = x=30, y=30.
Known Locations: AP1 = (5,5), AP2 = (5,15), AP3 = (20,10).
Unknown Location: X
Lets say X = (9,11)
how do we work out the intersection of all 3 circles by the maths.
your help is greatly appreciated.