There are five copies of a book each 20mm thick. When tilted, they fit snugly inside a cubic box with a gap of 16mm at the bottom left as shown.
I struggled with this in a recent practice paper, any help appreciated.
2026-04-01 15:43:36.1775058216
What is the proof the two triangles are similar and what is the length, width and height of the book?
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