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Contour lines cross a watershed or ridge line at _____
Perpendicular
Parallel
45º
0º
Perpendicular
Practice and solve "Contour lines cross a watershed or ridge line at _____..." for Civil - Surveying. The correct answer is Option A: Perpendicular. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Option **(a) **