Which statements are true?
choose all answers that are correct.
a.
–13 + 25 = 10 + (–22)
b.
20 + (–6) > 31 + (–19)
c.
8 + (–12) < –17 + 14
d.
–11 + (–15) > 6 + (–29)

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?