Can you draw perpendicular lines without using a protractor?
Investigate how this is possible.
This practical problem challenges you to make quadrilaterals with a loop of string. You'll need some friends to help!
Can you reproduce the Yin Yang symbol using a pair of compasses?
Can you mark 4 points on a flat surface so that there are only two
different distances between them?
A game in which players take it in turns to try to draw
quadrilaterals (or triangles) with particular properties. Is it
possible to fill the game grid?
A game in which players take it in turns to turn up two cards. If
they can draw a triangle which satisfies both properties they win
the pair of cards. And a few challenging questions to follow...
Cong explained his reasoning for this solution very carefully.
Go to last month's problems to see more solutions.
Gillian Hatch analyses what goes on when mathematical games are
used as a pedagogic device.
A game for 2 or more people, based on the traditional card game
Rummy. Players aim to make two `tricks', where each trick has to
consist of a picture of a shape, a name that describes that shape,
and two properties of the shape.