Some one please help me with this geometry

Answer: c) SAS~
divide 23.4 by 9 and you get 2.6
divide 20.8 by 8 and you get 2.6
these sides are similar because they are different by the SAME RATIO.
and they share an angle, which is in between the two similar sides.
that means the triangles are similar by the SAS~
hope this helps!