#### ridgemao

##### Senior Member

Chinese - Mandarin

MATHEMATICS THROUGH PAPER FOLDING

by ALTON T. OLSON (University of Alberta)

*Forming straight lines by*

......

56. Line symmetry

**folding creases**in a piece of paper is an interesting way of discovering and demonstrating relation- ships among lines and angles.......

56. Line symmetry

**Fold a line**in a sheet of paper. Cut out a kite-shaped figure similar to figures 56A and 56B.Is it correct to say "

**fold creases**" and "

**fold a line**" ?

I know the author wanted to express the idea of "create a line or creases by folding the paper".

Thank you.