**Descriptive Geometry**

**Assignment A6 2020/21/1**

Given the centre O of the face ABCDE of the pentagon based regular prism ABCDE*A*_{x}*B*_{x}*C*_{x}*D*_{x}*E*_{x}
, moreover given the line XY containing the edge AB.
The height of the prism is equal to the length of the edges of the
base. Construct the prism. Show the visibility assuming that the prism
is made from plates and its two pentagonal faces are removed. *O*(70, 75, 205); * X*(70,
75, 250); * Y*(105, 15, 285).