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Turning

Stage: 1 Challenge Level: Challenge Level:1

Well, let's have a look at doing some simple turning.
Here's something to do at the computer, or you can make a similar thing from card (see the Notes Section ).

Full Screen Version
This text is usually replaced by the Flash movie.

Use your mouse to move the green or red part of the discs. Can you make a turning that shows what:
a) a book being opened looks like from above?
b) turning a volume knob on your music player looks like?
c) a bicycle wheel looks like when going along?
d) a door would look like from above as it's being opened?
e) what a hamster wheel looks like when the hamster's running inside it?

Describe and then show some other things that you do or have seen, that turn in this way.

You can also have challenges that are just to do with the picture you see, for example, can you make the turning shape appear on the other side?
OppCircles
Can you make the red part twice the size of the green?
Have fun! You're experiencing Angles - the way turning is measured.

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities can be found here.
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NRICH is part of the family of activities in the Millennium Mathematics Project.