Respuesta :
the answer to your problem would be 10.
if two figures are congruent, each side is congruent to the same side on the other figure.
AB=FG; CD=HI; EA=JF
since CD=HI, and CD=10, then HI would also equal 10
if two figures are congruent, each side is congruent to the same side on the other figure.
AB=FG; CD=HI; EA=JF
since CD=HI, and CD=10, then HI would also equal 10