A 2D shape could have line symmetry or rotation symmetry, or both! 3D shapes are described by their faces, edges and vertices. The faces can be the same shape or different, and a 3D shape could ...

Mathematicians’ Favorite Shapes Hold the Key to Big Mathematical Mysteries ...

Scientists tested crows on their ability to recognize “geometric regularity,” a skill previously assumed to be unique to ...

They all have vertical symmetry. This means you can draw a mirror line down through the middle of each shape and divide it into two reflected halves. Remember vertical means from top to bottom.