When rolling 3 standard number cubes, the probability of getting all three numbers to match is 6216. What is the probability that the three numbers do not all match?

I’m really confused and need your assist me with this question i’ve never been taught

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?

Urgent? will give brainliest to the first correct answer what is the area of the figure?