Answer: C. 30o
A well conditional triangle is one in which angles are not less than 30o.
During the triangulation survey, a triangle must be formed to measure the horizontal and angular distances. A well conditional triangle is the one in which any angle of the triangle is not less than 30o and not more than 120o.
An equilateral triangle is known as an ideal well conditioned triangle. In case of triangulation, a well conditioned triangle is preferred because of accuracy of the survey work.
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