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7. To approximate the length of a lake, a surveyor starts at one end of the lake and walks 365 yards. He then turns 100" and walks 400 yards until he arrives at the other end of the lake. Approximately how long is the lake? 8. To approximate the length of a lake, a surveyor starts at one end of the lake and walks 210yards. He then turns 140" and walks 620 yards until he arrives at the other end of the lake. Approximately how long is the lake? 9. Peter has three sticks measuring 42in, 23in, and 27in. He lays them down to form a triangle. Find the measure of the angle enclosed by the 42in and 27in sides. For questions 10-12, Use Law of Sines or Law of Cosines to solve for all missing side lengths and angle measures. Round all side lengths to the tenth and angle measures to the whole number. 10. 11. 730 11.5 14 25 220 12. 320 Y /340 10 cm