When the lines join to make a shape they are not called lines, they are called sides. Some shapes are made from only straight sides. Some shapes are made from only curved sides. Some shapes have a ...

Now, a new study adds basic geometry ... traits like length of sides, parallel lines, right angles and symmetry. In the study, they could tell the difference between shapes like stars, crescents ...

When the lines join to make a shape they are not called lines, they are called sides. Some shapes are made from only straight sides. Some shapes are made from only curved sides. Some shapes have a ...