Δa'b'c' was constructed using δabc and line segment eh.

2 triangles are shown. line e h is the line of reflection. line segment b b prime has a midpoint at point d. line segment a a prime has a midpoint at point f. line segment c c prime has a midpoint at point g.

for to be the line of reflection between and , which statements must be true? select three options.

bd = db'
df = fg
m∠efa = 90°
the line of reflection, eh, is the perpendicular bisector of bb', aa', and cc'.
δabc is not congruent to δa'b'c'.