In the third century BCE, Apollonius of Perga asked how many circles one could draw that would touch three given circles at exactly one point each. It would take 1,800 years to prove the answer: eight ...

Monika Warzecha: The only redeeming thing about seeing a geometry set is that it reminds me I'm not in Grade 4 or Grade 7 or Grade 10, anymore You can save this article by registering for free here.

Titch could not be more excited about a trip to the seaside with her uncle Ted. However, Ted is a bit worried, as he has promised to help Titch to learn about geometry and he is not really sure what ...