Categories
Intermediate

The folded napkin

A square sheet of paper is folded symmetrically from a corner. If the fold length is 4, what is the area of the triangle formed by the other three corners?

Scroll down for a solution to this problem.

Solution

The triangle area is √3.

Solution by Ignacio Larrosa Cañestro.

Poem

Green paper napkin
Like flowers in Japan
A nice origami design
Folded as a sun catcher
It can be a fortuneteller
You can take it as a protection
Or write on your reflexions
Just play with as a kite
up in the air
Sail up there the breeze and go
Whichever it chanced to blow

Bella

🤞 Don’t miss these puzzles!

Subscribe to the weekly geometry puzzle e-mail.

One reply on “The folded napkin”

Leave a Reply to Peter H. Cancel reply

Your email address will not be published. Required fields are marked *

Optionally add an image (JPEG only)