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Click on a picture above for a large version and interactive model or show a theorem at Random.
When you think that the angle theorems are understood head for an Angle Activity.
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Featured ActivityNewsletter The Transum Newsletter for October 2025 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. |
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. Find out about the latests developments on this website by signing up for a Transum Subscription. You will receive a regular newsletter and have access to the answers to most of the puzzles and activities on this site. |
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Recently UpdatedTruculent Can you arrange the seven counters on the grid despite their truculent behaviour? So far this activity has been accessed 21012 times and 129 people have earned a Transum Trophy for completing it. |
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Idan Tal, Twitter
Tuesday, April 16, 2019