MathDB
shadow area

Source: flanders '02

September 28, 2005
geometry3D geometryvectortrigonometry

Problem Statement

A lamp is situated at point AA and shines inside the cube. A (massive) square is hung on the midpoints of the 4 vertical faces. What's the area of its shadow? http://www.mathlinks.ro/Forum/album_pic.php?pic_id=285