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

[@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.