Question 1028956
Think about removing the rectangle between the two right triangles.


{{{(12.25-11)/2=1.25/2=0.625}}}


The leg of each is 0.625 unit and you are looking for the hypotenuse, which is the other unknown segment forming the trapezoid.


{{{h=sqrt(0.625^2+6.5^2)}}}, or this is the length of each of the equal length legs.