100/99 is one, there are infinite answers though
For similarity measures of corresponding angles should be equal so we would use AA similarity postulate
The second condition tells you that

is half the size of

, so

, which could be rewritten in several ways. In standard form, that would be

.
Answer:
2.80
Step-by-step explanation:
Take the cost and divide by the number of padlocks
25.20/9
2.80
Each padlock costs 2.80
The first one is 50 the second one is 1,500