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Geoboards

This practical challenge invites you to investigate the different squares you can make on a square geoboard or pegboard.

Polydron

This activity investigates how you might make squares and pentominoes from Polydron.

Multilink Cubes

If you had 36 cubes, what different cuboids could you make?

Count the Trapeziums

Age 7 to 11 Challenge Level:


How many trapeziums, of various sizes, are hidden in this picture?

(By the way, some of us here at NRICH think they should be called trapezia . What do you think?)