A shape and space game for 2,3 or 4 players. Be the last person to be able to place a pentomino piece on the playing board. Play with card, or on the computer.
Age 7 to 11 Challenge Level:
Watch this short video clip:
Make a granny knot and a reef knot for yourself.
Now investigate their symmetries. Start with the granny knot.
Does it look the same after a half turn about a vertical
How about after a half turn about a horizontal axis from right to
Now try a half turn about a horizontal axis front to back. Does it
look the same this time?
(Don't forget you can play the video again to remind you of these
Try the same thing with a reef knot.
What is the same about the symmetries of the two knots?
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.