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These are the Transum resources related to the statement: "Pupils should be taught to derive and illustrate properties of triangles, quadrilaterals, circles, and other plane figures [for example, equal lengths and angles] using appropriate language and technologies".

Here are some specific activities, investigations or visual aids we have picked out. Click anywhere in the grey area to access the resource.

- Circle Pairs Find the matching pairs of circle diagrams and circle properties in this interactive online game.
- Circle Parts Kim's Game A memory game to be projected to help the whole class revise the names for the parts of a circle.
- Circle Theorems Diagrams of the circle theorems to be projected onto a white board as an effective visual aid.
- Circle Theorems Exercise Show that you understand and can apply the circle theorems with this self marking exercise.
- Circles Practise using pi to calculate various circle measurements. There are six levels of difficulty.
- Different types of Triangle Euclid and his friends explain how many different kinds of triangle there are.
- Geometry Toolbox Create your own dynamic geometrical diagrams using this truly amazing tool from GeoGebra.
- Polygon Angles A mixture of problems related to calculating the interior and exterior angles of polygons.
- Polygon Properties Connect the names of the polygons with the descriptions of their properties.

Click on a topic below for suggested lesson starters, resources and activities from Transum.

How do you teach this topic? Do you have any tips or suggestions for other teachers? It is always useful to receive feedback and helps make these free resources even more useful for Maths teachers anywhere in the world. Click here to enter your comments.