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?


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.