Napkin

A napkin is folded so that a corner coincides with the midpoint of an opposite edge. Investigate the three triangles formed.

Problem

Napkin printable sheet

Napkin printable sheet - getting started

 

Image
The diagram is explained in the text below.

 

A square paper napkin is folded so that the corner P coincides with the midpoint of an opposite edge as shown in the diagram.

Investigate the three triangles that are formed by folding in this way (where there is a single thickness of the paper).