Hello science folks! I've just started learning about trilateration. I am wondering if its possible to calculate the coordinates of a continuously growing circle(for example a sound wave) which hits three sensors at different times. I have added a picture so you can see what I mean. In the Wikipedia article they have both the coordinates for each sensor AND some kind of radius for each sensor. In my case I will have the coordinates for each sensor but not the radius. Instead I will know the time it takes for the wave to reach sensor#2 & #3, the time starts when the wave hits sensor #1.(look at the picture) The speed of the wave is also unknown but to get some theoretical measurements I have set it to √8 m/s, so it will take exactly 1 second for the wave to travel to sensor #1. So, known data: Coordinates of the three sensors time, started when sensor #1 detects the wave Unknown data: Velocity of the wave origin of the wave I hope you understand my question and I appreciate all the help I can get! Take an extra look at the picture if you dont understand.