for the triangles to be congruent by hl, what must be the value of x?; which shows two triangles that are congruent by the sss congruence theorem?; triangle abc is congruent to triangle a'b'c' by the hl theorem; which explains whether δfgh is congruent to δfjh?; which transformation(s) can be used to map △rst onto △vwx?; which rigid transformation(s) can map triangleabc onto triangledec?; which transformation(s) can be used to map one triangle onto the other? select two options.; for the triangles to be congruent by sss, what must be the value of x?