Answer:
The answer is 60
105 net area with filled in shape
Subtract 45 = 60 net space.
The surface area is not 35 as surface area means net a net of a shapes area.
The reasons why is they filled in the shape and used the height x width
L x H = 7 x 5 = 35
but if we subtract 12 from 35 = 60/23 and we get 2.6
2.6 x 60 = 105 + 41 + 23 = 169
13 x 13 =169
14 x sides = 13 changes.
So therefore 13 changes in 14 shapes makes the product of 13 x 14 = 182
182 has 3 shapes so 182/3 =60
Explanation: