### Please try this at home or school

Take a humble door knob and shine a strong flashlight to reveal a geometric shape. What is it?

January20

Take a humble door knob and shine a strong flashlight to reveal a geometric shape. What is it?

March10

Have you ever wondered why we put a round pizza into a square box and cut it into triangles? Don’t worry – most of us never think about it. But here is the exploration – check out what other shapes pizzas come in and find the most economic design.

July3

August19

Until recently, there were just 14 known convex pentagons (nonregular, five-sided shapes with outward-pointing angles) that could “tile the plane” (be arranged with flush sides on a flat surface, with no gaps or overlaps). But last month, some thirty years since the 14th was discovered, a 15th was identified. The convex pentagon in question and […]

August12

Platonic Solids are five regular polyhedra (“regular” because they are made up of faces that are all the same), and are called “Platonic” since they were known at the time of Plato (427-347 BC). This link to these shapes also has printable nets for constructing them… a great, practical way to get hooked into some […]

May13

This excellent visual guide shows you how to construct a Parallelogram – a shape with two opposite pairs of parallel sides. I remember a friend of my father who, when giving marching orders to his army group, said, “Keep those arms paralysed to the ground!” Of course, he meant “…parallel to the ground” but I […]

November19

I don’t know about you, but solving puzzles is great mathematical fun, including the logic ones. This site by Maths is Fun has a range of great puzzles for you to try in your spare time!