Before reading this guide, it may be helpful to read the guides from Module 1 on the properties of angles and the properties of 2D shapes. The sum of the angles inside any polygon can be found by ...

Crows are able to look at a handful of four-sided shapes and correctly distinguish those that exhibit geometric regularity ... clearly had a sense of right angles, parallel lines, and symmetry.

This suggests that recognizing geometric shape regularity may be ... The more regular the shape's angles and sides, the more accurate 'intruder' detections the crows made. In a sort of progression ...

Join the points where the right angles occur to form a triangle ... can’t be illuminated can be done through a clever application of simple math, proving that a lot of shapes can be illuminated has ...

Squares, triangles, circles - these geometric shapes appear everywhere in art and ... showing that crows clearly had a sense of right angles, parallel lines, symmetry. And that's a big deal ...