Trick to identify/ draw Visible edges and Hidded edges in Projections of Solids

Projections of solids,
Identifying dark visible edges and hidden edges in second top view and final front view.
An example of Hexagonal based pyramid is taken with Beta angle condition.
This video describes the identification of visible edges and hidden edges after drawing initial positions.
Drawing initial position, annotations and dimensioning must be known.
As a standard practice first angle projection is used.
VTU
Sketch book
Engineering Visualization
21EVN15/25
Orthographic Projections of Points, Lines and Planes:
Introduction to Orthographic projections, Orthographic projections of points in all the quadrants.
Orthographic projections of lines. (Placed in First quadrant only)
Orthographic projections of planes viz triangle, square, rectangle, pentagon, hexagon and circular laminae. (Placed inFirst quadrant only).
Orthographic Projection of Solids:
Orthographic projection of right regular solids (Solids Resting on HP only);
Prisms & Pyramids (triangle, square, rectangle, pentagon, hexagon), Cylinders, Cones, Cubes, &Tetrahedron.
Application problems on projection of solids.
#EngineeringVisualization
#21EVN15/25
#OrthographicProjections

[@jeevajeevankumar7399]

O f is not joined in figure of pyramid

[@rajubasava]

Yes, O'f' is also hidden line.
Video describes process of drawing visible and hidden edges.
Thank you.

[@manukushaldm133]

Sir is this identification is applied for all problems in projection of solids..

[@rajubasava]

Almost every problem can be solved with this method.