Angle Theorem 9

Theorem

Below is an interactive version of the diagram. Drag the points to see how the diagram responds.

The following animation was created and is shared by Anthony C.M. OR under a License: CC-BY-SA.

Main Angle Theorems page.

When you think that the angle theorems are understood head for an Angle Activity.

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Four Colour Theorem

Four Colour Theorem

This mathematical activity involves colouring in! That makes a change. Using the paint bucket tool can you flood fill the regions so that no two adjacent regions are the same colour?

This is a Shine+Write visual aid designed to be projected onto a whiteboard for whole class exposition.

You can find other popular visual aids on our Shine+Write page.

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Prime Prevention

Prime Prevention

Players take turns placing numbers from 1-9 on the grid. Avoid making three-digit prime numbers in any direction! So far this activity has been accessed 285 times and 3 Transum Trophies have been awarded for completing it.

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