This plugin adds some common ways to measure the degree of compactness of a geometry(ies) (Polsby–Popper, Reock, Skew, etc...). These functions are added as part functions expression that works in the ...

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 to ...

Suppose you were in the middle of nowhere, and there were no signs or landmarks to help you find your way. Would you know how to find your way home? Someone might tell you via phone or radio to 'walk ...