Prove Triangle congruence
What is the first error Ioana made in her proof?
a. Ioana used an invalid read to justify the congruence of a pair of sides or angles.
b. Ioana only established some of the necessary conditions for a congruence criterion.
c. Ioana established all necessary conditions, but then used an inappropriate congruence criterion.
d. Ioana used a criterion that does not guarantee congruence.
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