What will it Look Like? :: City Technology - Engineering for Pre K - 5 kids

How to Look at a Book from an Edge View

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.
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.