These reflected rectangles are example of congruent shapes. When transforming a shape, either through translation, reflection or rotation, a congruent shape is produced. Enlargements create shapes ...

Mathematicians have resolved the first one trillion cases of an ancient mathematics problem. The advance was made possible by a clever new computational technique for multiplying large numbers. The ...

One of the delightful aspects of shapes is how they can be cut up and recombined in surprising ways. Many years ago, a student I was working with asked me if you could take any collection of congruent ...