First question: two straight lines are parallel, that is, the slopes are equal. A/b= 1/2 can be obtained by combining the types of questions.

Get a=2, b=4 or a = 1, b = 2. When a=2, b must be equal to 4, and the probability of this situation should be (1/6) * (1/6) =1/36.

Question 2: Being able to form a triangle means that the sum of two sides is greater than the third time, and the difference between the two sides is less than the third time.

a= 1，b=2

a=2，b= 1 a=2，b=2 a=2，b=3

a=3，b=2 a=3，b=3 a=3，b=4

a=4，b=3 a=4，b=4 a=4，b=5

a=5，b=4 a=5，b=5 a=5，b=6

a=6，b=5 a=6，b=6

A * * * There are fifteen situations, and each situation is still (1/6) * (1/6) =1/36.

The final result is 15/36=5/ 12.