A die is rolled 3 times. ​What is the probability of getting a "1" on the first roll, a "2" on the second roll, and a "3" on the third roll? ​

​Write your answer as a reduced fraction.

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1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.