Yancheng Waterworks Recruitment

Solution: (1) As shown in the figure, if the intersection point m is MN⊥AC of n point, then this n point is the demand.

(2) As shown in the figure: ∫∠EAC = 60, ∠ EAM = 30.

∴∠CAM=30，

∴∠AMN=60，

Looking at point M at \u C, its northwest direction is 60.

∴∠MCB=30，

∫∠EAC = 60，

∴∠CAD=30，

∴∠BCA=30，

∴∠MCA=∠MCB+∠BCA=60，

∴∠AMC=90，∠MAC=30，

∴MC = 12ac = 12×200 = 100(m)，∠ CMN = 30，

∴NC= 12MC=50 (male),

∴AN=AC-NC=200-50= 150 (m).