BrainDen.com - Brain Teasers
• 0

# 2 cuts and then get 5 triangles

## Question

How to use a scissors to cut any 1 rectangle shape of paper 2 times and get no more or less 5 triangles?

1.Fold the rectangle to two same size rectangle

2.Cut it diagonal and get 3 triangles

3.Put the same size triangles together and cut from one angle to the opposite side

## 4 answers to this question

• 0

Do the cuts have to be straight lines?

##### Share on other sites
• 0
Do the cuts have to be straight lines?

Yes.

##### Share on other sites
• 0

For the cut-pieces of a rectangle to form triangles, the cuts must pass thru corners [not sides].

Only two such cuts exist - along the two diagonals.

That gives you 4 triangles, not 5.

The only other way to cut a rectangle is to cut it after it has been folded.

All my tries at this so far have led to an even number of triangles.

I'll keep trying.

##### Share on other sites
• 0
For the cut-pieces of a rectangle to form triangles, the cuts must pass thru corners [not sides].

Only two such cuts exist - along the two diagonals.

That gives you 4 triangles, not 5.

The only other way to cut a rectangle is to cut it after it has been folded.

that's the trap.

You need to fold the paper.

## Create an account

Register a new account