Two students are playing a math game. the object of the game is to make the least possible number by arranging the given digits inside absolute value bars on a card. in the first round, each player will use the digits 3, 5, and 7 to fill in the card. one student arranges, |-75.3|, on the card. what was this student's mistake?

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?