Which point is the midpoint of segment ab?

12 point are triangles pqr and stu congruent? what is the congruency that proves they are congruent? what is the perimeter of triangle pqr?

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x