Are these statements always true, sometimes true or never true?
How would you move the bands on the pegboard to alter these shapes?
This problem shows that the external angles of an irregular hexagon add to a circle.
Can you sketch triangles that fit in the cells in this grid? Which ones are impossible? How do you know?
In this game, you turn over two cards and try to draw a triangle which has both properties.
Ayah conjectures that the diagonals of a square meet at right angles. Do you agree? How could you find out?
