-1 + 10 = 9 +10 = 19 + 10 = 29 so the next would be 39 because you add ten to it and there is only one answer with 39 so it's C
The answer to the question is 33%. Hope this helps!
Answer:
The figure above is congruent by SSS axiom.
AB=DE (S)
AC=EF(S)
BC=DF(S)
Hence the given triangle are congrent.SSS axiom is Side.Side.Side axiom.
I think it will help you.