Want to calculate the radius of a circle from its area or perimeter? Here are the key formulas that no one explains clearly! ...

The Calvin University Math Circle is an opportunity for 6th–8th grade students (typically 11–13 years old) to engage with exciting problems and topics in mathematics. Meetings are led by a professor ...

Mathematicians at Monash University have cracked a centuries-old puzzle dating back to the 17th century, extending Descartes’ ...

The circumference of a circle = \(\pi d\) or \(2\pi r\). Look at the sector of the circle shown below. To calculate the length of the arc, we need to know what fraction of the circle is shown.

Monash University researchers have extended Descartes’ Circle Theorem by finding a general equation for any number of tangent ...

Circle theorems are properties that are true for all circles, regardless of their size. There are six theorems to learn and recognise. Questions can have a combination of theorems. It is important ...