Question 982117
Look at the points on a cartesian coordinate system.  They show the endpoints of the base of the isosceles triangle.  The other vertex would be on the y-axis and would be the center of  a circle.  Notice that the given points form the segment of the triangle parallel to the x-axis.  This makes identifying the point on the x-axis to be easy.  Look for the midpoint of x coordinates of -5 and 2.


{{{(-5+2)/2=-3/2=-1&1/2}}}


The vertex is  ( -3/2, 0 ).