<span>I'll try to explain. The trouble is that I do not know English :)
</span><span>About Points
</span>S = (x,y) <span>searched point (it will be in the third quadrant )
</span>M = (-2,0) <span>Midpoint | SP |
</span>P = (3,5) <span>one end of the segment | SP |
</span>
<span>You have to draw Cartesian.
</span><span>we set in a point M and P. We both points by a simple and we extend it for the third quarter of the system. Compass measure the distance from the point M to the point P. From the point M we set a compass point S. Figure attached. Received point S = ( -7 , -5 ) . It sought a point that calculate .
</span>We use the information that | SM | = | MP |
Answer : S = (-7,-5)
<span>as soon as I had a good range will add drawing</span>