Question

statement reason
1 $\angle a \cong \angle c$ given
2 $\angle dea \cong \angle bec$ given
3 $\overline{ae} \cong \overline{bc}$ given
4 $\triangle aed \cong \triangle ceb$ angle - side - angle congruence
what is the first error zoe made in her proof?
choose 1 answer:
a zoe used an invalid reason to justify the congruence of a pair of sides or angles.
b zoe only established some of the necessary conditions for a congruence criterion.
c zoe established all necessary conditions, but then used an inappropriate congruence criterion.
d zoe used a criterion that does not guarantee congruence.

Explanation:

Answer:

C. Zoe established all necessary conditions, but then used an inappropriate congruence criterion.