A British dentist believes he has solved one of the most persistent puzzles in art history. By analyzing a small but precise ...

Leonardo da Vinci, the famous Italian polymath who painted the Mona Lisa, had a sophisticated geometric understanding far ...

Use a ruler, protractor and a pair of compasses to construct a triangle accurately. After the triangle has been constructed, leave the construction lines visible so each stage of the process is shown ...

How many triangles can you count in this image? It’s harder than it looks and bound to baffle even the sharpest of brains for ...

So, what's with the biscuits? Oh a triangulator machine! Very cool! Right, there are four different types of triangle. First, here's an isosceles triangle, it has two equal length sides and two equal ...