Angle Theorem

Theorem

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

Main Angle Theorems page.

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

Featured Activity

Newsletter

Newsletter

The Transum Newsletter for June 2020 has just been published. Click on the image above to read about the latest developments on this site and try to solve the puzzle of the month. You can read the newsletter online or listen to it by downloading the podcast.

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Number Jigsaws

Number Jigsaws

Online, interactive jigsaw puzzles of grids of numbers. So far this activity has been accessed 36881 times and 3614 people have earned a Transum Trophy for completing it.

Apple

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