Problem Pictures
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PP3 CD-ROM cover

This picture is taken from Problem Pictures Numbers, a CD-ROM of photographs with activities for mathematics teaching.

Carved stone

This carved stone was in a salvage yard.

When it rains, how would the water drain off the stone?

What kind of symmetry does the stone have? What angles does it have?

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The photographs and screen images on this website are copyright and may not be reproduced without permission. Copyright Richard Phillips 2001/2009. Page updated 6 October 2009.