Quadrilaterals

Explore when it is possible to construct a circle which just touches all four sides of a quadrilateral.

If you split the square into these two pieces, it is possible to fit the pieces together again to make a new shape. How many new shapes can you make?

Take an equilateral triangle and cut it into smaller pieces. What can you do with them?

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a rhombus.