Question

A regular pentagonal lamina (thickness neglected), with each side measuring 1 m, is touching a vertical wall on its vertex (say A) and making a surface inclination of 30 deg with the wall. The line connecting A to the mid-point of the opposite side appears to be making 40 deg to the ground. Draw the projections of this lamina by change of position method. Use 1:4 scale.

Answer 1

Answer:

PROJECTIONS OF PLANES In this topic various plane figures are the objects. What is usually asked in the problem? To draw their projections means F.V, T.V. & S.V. What will be given in the problem? 1. Description of the plane figure. 2. It’s position with HP and VP. In which manner it’s position with HP & VP will be described? 1.Inclination of it’s SURFACE with one of the reference planes will be given. 2. Inclination of one of it’s EDGES with other reference plane will be given (Hence this will be a case of an object inclined to both reference Planes.)

Explanation:

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