Lines AB and CD intersect at point E as shown in the figure. The points B and Care not visible from each other, but both can be seen from point G. If the angle EBG = 20°12', ECG = 15°27', BGC = 138*29', and the distances BG and CG are 376 and 417 meters respectively. 1. Determine the value of angle FEC. 2. Determine the distance BC. 3. Determine the distance EC.

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Q: Problem 2: Locate the centroid of the plane Y 60 mm -105 mm area 75 mi I

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State Plane Coordinate Systems

The state plane coordinate system (SPCS or SPS) is a collection of 124 coordinate systems or geographic zones prepared for particular regions of the U.S. Every state consists of one or more than one state plane zone, the boundaries of which generally follow the county lines. Inside the U.S., there are 110 zones in total, 10 more zones in Alaska, 5 in Hawaii, and 1 for Puerto Rico and US Virgin islands. The system is extensively used for geospatial and geographic data assembling by the state and local governments.