A 2D shape is symmetrical if you can draw a line through it and it looks exactly the same either side. This line is called a line of symmetry. Oh that rather smug expression tells me that square knows ...

Big Idea – We can describe, measure, and compare spatial relationships. to build on students' knowledge of symmetry and develop students' reasoning with properties of symmetry to develop an ...

The human visual system exhibits a remarkable ability to decipher the three-dimensional structure of the world from two-dimensional retinal images. Central to this process is the utilisation of shape ...