One of the Lehmann's rules of plane tabling, is
1.location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances
2.when looking in the direction of each of the given points, the instrument station will be on the right side of one and left side of the other ray
3.when the instrument station is outside the circumscribing circle its location is always on the opposite side of the ray to the most distant point as the inter-section of the other two rays
4.none of these.
Posted Date:-2021-03-26 00:51:12