Add Yahoo as a preferred source to see more of our stories on Google. Single line art is when an artist uses a continuous line to create an image without lifting the pencil or utensil off the canvas.

Reflective symmetry is when a shape can be folded in half, with either side of the fold being a mirror image of the other. Rotational symmetry is when a shape can be rotated and it still looks the ...

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 ...