Similar and Congruent Figures Question

Sam is checking on an experiment that is being conducted in an open field. There are three almost identical small plants, which have been planted in different places in the field. Starting at a large boulder, the first plant is 8.3 ft directly east. The second plant is 14.1 ft directly south of the first plant. The third plant is 9.7 ft directly east of the second plant. Sam has to follow these directions each time he comes, in order to find the plants. However, after checking the third plant, he walks directly back to the boulder from where he started. When Sam is walking back to the boulder after checking all the plants and he crosses his earlier path where he walked between the first and second plants, about how far south of the first plant is he? Round the answer to one decimal place.

1. 6.5 ft
2. 7.6 ft
3. 12.3 ft
4. 16.5 ft