Approximating the Area of a Lake To approximate the area of a lake, Cindy walks around the perimeter of the lake, tak ing the measurements shown in the illustration. Using this technique, what is the approximate area of the lake?
[ Hint: Use the Law of Cosines on the three triangles shown and then find the sum of their areas.]
speed of 10 knots. After 1 hour, the ship turns 90° toward the southwest. After 2 hours at an average speed of 20 knots, what is the bearing of the ship from Boston?
Drive Wheels of an Engine TIle drive wheel of an engine is 13 inches in diameter, and the pulley on the rotary pump is 5 inches in diameter. If the shafts of the drive wheel and the pulley are 2 feet apart, what length of belt is required to join them as shown in the figure?