The answer is 4 because it adds 4 to each one.
60
The lines are parallel. Therefore the angle is the same.
12x = 2,700
---- ---------
12 12
x = 225
They can make a total of 225 necklaces
33^2 + x^2 = 65^2
1089 + x^2 = 4225
1089-1089 + x^2= 4225-1089 (subtract both sides)
x^2 = 3136
x = 56cm