Well-conditioned and ill-conditioned triangles in surveying

Well-conditioned triangle

A triangle is said to be well conditioned if no angle in it is less than 30° and greater than 120°.

Equilateral triangle considered the best well conditioned triangle or ideal triangle.

Well conditioned triangles are preferred because there apex point are very sharp and located by a single 'dot'.

ill-conditioned triangles

A triangle is said to be ill conditioned in which an angle is less than 30° and greater than 120°.

ill conditioned triangle are not used in chain surveying , this is because there apex points are not sharp.

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