1.73 is the answer >:-)............................
Ok so in order to find the answer to this problem we are going to Multiply

and

.
Answer:
Double a number increased by half the same number
Step-by-step explanation:
10
make a triangle after the first square and a square after the second printed triangle, then a triangle after that and after the last printed square a triangle
11
3, 4, 3, 3, 4
12
repeating