What type of Math and how to solve (points and distance)

Question

I think it has to do with geometry and algebra.

We have a rectangle with four points.

1. We know each point as $(0,0), (0,10),(10,10)$ and $(10,0)$.
2. In the rectangle we have another point $(x,y)$.
3. The distance from this point to the other points is known: $a,b,c,d$

How do we figure out $x,y$ of the point?

Answer 1

Look at the following image and try so set up the equations. (Pythagoras)