What will it Look Like?

How to Look at a Book from an Edge View

1. Hold a single piece of ordinary paper with both hands so all you can see is the bottom edge. Close one eye. Instead of a rectangle, the sheet should look like a line.

2. Now do the same thing with the open book. The book itself look like a straight line, and the pop-up piece should be a curved line above it. The diagram below shows the book before and after closing.

Unit Lessons