**Descriptive Geometry**

**Assignment A5 2020/21/1**

Given the pyramid ABCDM whose base is the parallelogram ABCD lying in a 1st projecting plane. A square based infinite prism 1234 is also given, its edges 1, 2, 3, 4 are 1st projecting lines (so the 1st image of the prism is the square 1'2'3'4' ). Construct the intersection of the two bodies. Examine the visibility assuming that the pyramid is solid, and its part intersected by the prism is removed together with the prism. M(10, 55, 225); A(175, 45, 205); B(165, --, 285); C(140, 160, 245); D(--, --, --); 1'(60, 70); 2'(--, --); 3'(160, 70); 4'(--, --).