Knots

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# Knots - PowerPoint PPT Presentation

Knots. Holy trefoils, math fans!. The Inca & the Quipus. The Inca used quipus --colored strings with carefully placed knots-- to keep records of their trade with each other and with other tribes. A quipus. Knots and Art. Celtic artwork uses knots. Knots and Sailing.

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## PowerPoint Slideshow about 'Knots' - daniel_millan

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Presentation Transcript

### Knots

Holy trefoils, math fans!

The Inca & the Quipus
• The Inca used quipus --colored strings with carefully placed knots-- to keep records of their trade with each other and with other tribes.

A quipus

Knots and Art
• Celtic artwork uses knots.
Knots and Sailing
• Any good sailor can tie lots of different knots.

Bowline Knot (pronounced Boh-Lin)

Reef Knot

Angler’s Knot

What is a knot?
• If you know how to tie a shoe, then you know what a knot is.
• The only difference between this knot and a knot mathematically is that we connect the ends.
When are two knots the same?
• Two knots are equivalent if you can deform one to the other without cutting the knot open.
Are these knots the same?
• Can you use your rope to change one into the other?